Correct Answer: B

Rationale: The word 'mercurial' in this sentence means unpredictable or prone to sudden changes in mood or behavior. Justin's temperament can be characterized as unpredictable, which is causing him to not work well with others. Choice A, 'Continuous,' does not align with the meaning of 'mercurial' as it implies a steady, uninterrupted flow. Choice C, 'Mercenary,' refers to being primarily motivated by money or reward, which is not the context here. Choice D, 'Miraculous,' means extraordinary or remarkable, which is not the intended meaning in this sentence.

Correct Answer: D

Rationale: In this sentence, the word 'quarantine' is used to convey the idea that the patients are isolated or separated from the general population. Quarantine is often implemented to prevent the spread of diseases or infections, and in this context, it implies confinement or isolation to ensure the safety of others. The other choices are incorrect because 'A' refers to specialized medical attention, 'B' refers to a specific medical treatment, and 'C' implies being held against one's will in a rehab facility, none of which capture the meaning of 'quarantine' as used in the sentence provided.

Correct Answer: A

Rationale: Qualms refer to feelings of doubt, hesitation, or uneasiness about something. They are typically used to describe a person's reservations or concerns about a decision or action. This aligns with the meaning of 'misgivings,' making it the correct choice in this context. Choices B, C, and D are incorrect. 'Habits' refer to regular tendencies or practices, 'Serenity' refers to a state of calm or peace, and 'Dispatches' refer to sending off to a destination or taking care of a task promptly, none of which capture the meaning of 'qualms.'

Correct Answer: C

Rationale: Contact dermatitis occurs through the sense of touch when the skin comes into direct contact with irritants or allergens, leading to an inflammatory reaction. This condition is commonly caused by the skin being in contact with items like certain chemicals, fabrics, plants, or metals, resulting in redness, itching, and sometimes blisters. The other choices (smell, taste, sight) do not relate to the cause of contact dermatitis, which specifically involves the skin's direct contact with irritants or allergens.

Correct Answer: A

Rationale: The correct answer is A: 'Mostly.' The word 'principally' means mainly or mostly. It is used to describe something that is primarily or predominantly true in a given context. Choice B, 'Clearly,' is incorrect as it does not reflect the primary meaning of the word. Choice C, 'In our opinion,' is incorrect as it does not capture the essence of 'principally.' Choice D, 'Royally,' is incorrect as it does not align with the definition of the word.