My best guess is C because a<span>n </span>active verb <span>is when the </span>verb<span> is clearly the subject of the sentence.</span>
The best way to punctuate the bolded portion of the quotation is the following:
C. them."-C.S. Lewis
This is the best way considering that the sentence ends on 'Lewis'. Periods always go inside quotations, as you can see from this brief description between different citing standards.
MLA: Commas and periods directly following quotations always go inside closing quotation marks. Question marks can vary depending if the question is part of the quote, then the punctuation mark goes inside the quotation marks. If the question is not part of the direct quote, it goes outside.
AP: All punctuation goes inside the closing quotation marks. This includes commas, periods, question marks and exclamation points.
Chicago: Periods and commas always go inside quotation marks. Question marks and exclamation points that are part of the original quote are included inside quotation marks.
The sentence that has an error in subject-verb agreement is D. The man, in the next apartment, as well as the people across the hall, have lived in the building since 1960.
Subject-verb agreement means that the subject of a sentence and the verb must agree in number. That is to say, both of them need to be singular or plural. In sentence D, the subject of the sentence is "the man" and the verb is "have lived". As the sentence refers to one man, the verb should be "has lived" in order to agree in number with the subject.
