The answer to your question would be that the sentence that correctly uses an MLA in-text citation is the following one: Research done by fish biologist Sarah Myers suggests that 25 percent of the carp are carriers of the vius (25). That is, the correct option would be A.
In MLA, you refer to other texts by using parenthetical citation. In this way, relevant source information is between parentheses whenever a sentence uses a quotation or paraphrase. Usually, this is done by putting all the relevant information in parentheses at the end of the sentence. The information to be included should be the author's last name and the page number(s) from which the quotation or paraphrase is taken must appear in the text. Therefore, the author's name must appear in the sentence itself or in parentheses following the quotation or paraphrase, but the page(s) number should appear in the parentheses, which is the case here.
This is a sentence. It has a verb and a subject.
The correct answer is D. There is no single topic sentence.
Explanation:
A topic sentence is a sentence that summarizes the main idea of a paragraph, this sentence is usually the first sentence in the paragraph and states what the paragraph is about. On the other hand, the paragraph presented here deals with multiple topics or concepts including the Earth's crust, the plates, the Earth's mantle, volcanoes, earthquakes, and mountain ranges, this means the paragraph is related to geography but explores multiple ideas that are not summarized in any of the sentences presented in the paragraph, neither at the beginning nor at the end of it. Thus, as there is no any sentence or phrase that states what the paragraph is about as a unit or summarizes all the ideas of the paragraph there is no a single topic sentence because this paragraph includes multiples ideas that might be difficult to summarize in only one topic sentence.
The last one has the correct punctuation and adverb
