Correct Answer: C

Rationale: The email sent by the instructor after reconsidering his grading plan for the semester is aimed at persuading the students to understand the situation and potentially take certain actions based on his decision. It is not a technical piece that focuses on explaining complex processes, nor is it primarily a narrative recounting events. It also does not strictly provide information or explain a topic (expository writing). Instead, the email's purpose is to influence the students' perspective or behavior, making it a persuasive type of writing.

Correct Answer: C

Rationale: The passage provides detailed instructions on how to take care of a little girl, indicating that the intended audience is someone other than the child's parents. A babysitter is the most likely recipient of these instructions, as they are typically hired to care for children when the parents are away. The specific guidance on feeding, naptime routine, and other care tasks align with what a babysitter would need to know to care for a child in place of the parents. Choices A, B, and D are incorrect because the passage does not address the child's parents directly. It focuses on providing guidance to someone temporarily responsible for the child's care, such as a babysitter.

Correct Answer: D

Rationale: The passage emphasizes the importance of studying a foreign language in high school for future success, including college acceptance rates and job market demand. To evaluate the argument's validity, it is crucial to examine the direct impact of studying a foreign language on college acceptance rates. Choice D is the correct answer because it directly addresses this aspect by comparing the correlation between high school students' study of a foreign language and subsequent college acceptance rates. This comparison would provide concrete evidence supporting or refuting the argument presented in the passage. Choices A, B, and C, though related to language education, do not directly assess the specific relationship between studying a foreign language in high school and college acceptance rates, making them less relevant for evaluating the argument's validity.

Correct Answer: C

Rationale: Alexander Graham Bell moved to Canada early in his life, before inventing the telephone and developing other technologies. Choice A is incorrect because Bell did not help found the National Geographic Society; this happened years after his major inventions. Choice B is incorrect because Bell developed a metal detector after inventing the telephone. Choice D is incorrect because Bell invented the telephone after moving to Canada.

Correct Answer: A

Rationale: The passage describes spelunking as 'hit the road towards it as soon as you can' and 'discover the wonders of the cool, dark earth even while it is weltering hot in the outside world.' This indicates that spelunking involves exploring inside a cave, making option A, 'exploring inside a cave,' the correct answer. Choices B, C, and D are incorrect as they do not align with the description of spelunking provided in the passage.