Correct Answer: A

Rationale: The correct contraction to use in this sentence is 'who's,' which is short for 'who is.' In the given context, 'who's' indicates the correct possessive form, clarifying that the clients are confused about who is in charge. Choice B, 'Whos,' is incorrect as it does not use an apostrophe to indicate the omitted letter. Choice C, 'Who'll,' is incorrect as it is a contraction for 'who will,' which does not fit the context of the sentence. Choice D, 'Who,' is incorrect as it is not a contraction and does not clarify the intended meaning of the sentence.

Correct Answer: C

Rationale: Option C is the correct answer as it uses introductory punctuation correctly by placing a comma after the introductory clause 'Since we only have ten minutes.' Commas are used to separate introductory phrases or clauses from the main clause in a sentence. Option A is incorrect as it lacks the necessary comma after the introductory phrase. Option B uses a semicolon, which is not typically used in this context. Option D uses a colon, which is not appropriate for introducing the following clause in this sentence structure.

Correct Answer: A

Rationale: The correct answer is A because it correctly uses the second-person narrative voice by addressing the reader as 'you,' directly involving them in the action. Choices B, C, and D use first-person ('I'), third-person singular ('he'), and third-person plural ('they') perspectives, respectively, which do not align with a second-person narrative voice. It is essential to identify the perspective being used in a sentence to determine if it matches the criteria specified in the question.

Correct Answer: C

Rationale: The word 'shear' means to cut, while 'sheer' in this context means 'complete' or 'unqualified.' The correct spelling in the sentence should be 'sheer.' Choice A, 'peeked' is the correct past tense of 'peek,' meaning to glance quickly or briefly. Choice B, 'through' is the correct preposition to indicate moving in one side and out the other. Choice D, 'scene,' is the correct term for a part of a play or movie, not 'seen,' which is the past participle of 'see.'

Correct Answer: A

Rationale: The correct answer is A. A thesis statement should be specific to provide clear direction for the paper and focus the argument. This helps guide the writing process and ensures that the paper stays on track. Choice B is incorrect because the written work should support and prove the thesis statement, not disprove it. Choice C is incorrect because the thesis statement typically appears at the beginning of a paper to introduce the main argument. Choice D is incorrect because supporting evidence is crucial in any thesis statement, regardless of whether it expresses an opinion or not.