Which of the following statements is true? a. a clause has a subject and a verb; a phrase does not. b. a clause is a group of related words; a phrase is not. c. a phrase has a subject and a verb; a clause does not. d. a phrase is a group of related words; a clause is not.

The statement which is true is A. a clause has a subject and a verb; a phrase does not. A phrase consists of just a couple of words where there is no finite verb, because that would make it a clause, not a phrase. Neither a phrase nor a clause need to have related words, which is why B and D are incorrect. C is incorrect because the opposite is true.

The answer would be d, coherence.