SAT English Practice Question

According to experts, "the most important feature of a good research paper is its clarity." However, good research papers are not simply clear; they are also concise, well-organized, and well-supported. The writing should be free of errors in grammar and mechanics. The argument should be logical, and the evidence should be relevant, credible, and persuasive. What is the most likely reason for the use of quotation marks?

1. A.indicate that the phrase is a direct quotation from a source.
2. B.emphasize the importance of the phrase.
3. C.show that the phrase is a common saying.
4. D.suggest that the phrase is debatable.