Choose the word or phrase that best indicates the meaning of the 'quoted' word. 'Rational' means:

Correct Answer: B

Rationale: The correct answer is 'B: Reason.' 'Rational' means based on reason or logic. Choice A, 'Angry,' is incorrect as it does not relate to the meaning of 'rational.' Choice C, 'Rodent,' is a completely unrelated term. Choice D, 'Proportion,' also does not capture the meaning of 'rational,' which is about being logical or reasonable.

Correct Answer: C

Rationale: The correct answer is 'C: Immigrant.' An immigrant is a person who comes to live permanently in a foreign country, such as the United States. Choice A, 'Immigrate,' refers to the action of entering a foreign country to live there. Choice B, 'Migrate,' means to move from one place to another. Choice D, 'Emigrant,' is someone who leaves their own country to settle permanently in another.

Correct Answer: C

Rationale: The correct answer is C: 'Gradual.' In the context provided, 'insidious' describes a disease that develops slowly and harmfully over time, without being easily noticed. Choices A, B, and D are incorrect. 'Sudden' (choice A) means something happening quickly or unexpectedly, 'Suffer' (choice B) means to experience pain or hardship, and 'Graduate' (choice D) means to successfully complete a process or course of study, none of which capture the intended meaning of 'insidious' in this context.

Correct Answer: B

Rationale: 'Biologists' is a noun in the sentence, referring to a group of people who study wildlife and their behaviors. In this context, 'biologists' is not describing or modifying another noun, making it a noun itself. Therefore, options A, C, and D are incorrect.

Correct Answer: D

Rationale: The word 'indigent' refers to people who are poor or impoverished, lacking financial resources. Therefore, the correct choice is D, 'Impoverished.' Choices A, B, and C are incorrect because they do not accurately reflect the meaning of 'indigent.' Choice A, 'Uninjured,' is unrelated to financial status. Choice B, 'Apathetic,' means showing no interest or concern, which is irrelevant. Choice C, 'Resentful,' means feeling bitterness or indignation, which is also unrelated to poverty.

Correct Answer: A

Rationale: The correct answer is A: 'Confinement away from the general population.' Quarantine refers to keeping someone isolated from the general population to prevent the spread of disease. Choice B, 'A specialist's care,' is incorrect as it refers to medical treatment by a specialist, not isolation. Choice C, 'Experimental drug therapy,' is incorrect as it involves the administration of new drugs for research purposes, not isolation. Choice D, 'Imprisonment in a rehabilitation unit,' is incorrect as it implies being detained in a rehabilitation facility, not isolation for health reasons.

Correct Answer: C

Rationale: In this sentence, the correct choices are 'They're' and 'their.' 'They're' is a contraction of 'they are,' which fits the context of the sentence as it suggests ownership of the dog. 'Their' is a possessive pronoun showing ownership. Choice A is incorrect as 'there' refers to a place and doesn't make sense in this context. Choice B is incorrect as the possessive pronoun 'their' should come before the noun 'dog'. Choice D is incorrect as 'they're' should be used before the verb 'having trouble' to form a contraction for 'they are'.

Correct Answer: A

Rationale: 'Imply' means to suggest or indicate something indirectly. In this context, 'Infer' (choice B) is incorrect as it means to deduce or conclude information based on evidence and reasoning, not to suggest. 'Opinion' (choice C) refers to a personal view or judgment, not the act of suggesting indirectly. 'Latter' (choice D) means the second of two things mentioned.

Correct Answer: D

Rationale: The correct answer is D: 'Soon to occur.' The word 'impending' is used to describe something that is about to happen or is soon to occur. In the context of the sentence provided, 'impending' operation indicates that the operation is about to take place. Choices A, B, and C are incorrect because 'impending' does not mean 'very serious,' 'required,' or 'elective.' Instead, it specifically refers to the timing of the operation as being imminent.