A restrictive clause is one that

A. should be set off by commas.
B. functions as an adverb.
C. usually occurs at the beginning of a sentence.
D. limits the meaning of the word it describes.

..D?

Right.

Yes, that's correct. A restrictive clause is a type of dependent clause that limits or restricts the meaning of the word it describes. It provides essential information to the sentence and is not set off by commas. So option D, "limits the meaning of the word it describes" is the correct answer.

Yes, you are correct. A restrictive clause is one that limits the meaning of the word it describes. It provides essential information that is necessary for the complete understanding of the sentence. In contrast, non-restrictive clauses, also known as non-essential or descriptive clauses, provide additional information about the word or phrase they modify but do not limit its meaning. Restrictive clauses are not set off by commas, and they can occur anywhere in a sentence, not just at the beginning. Therefore, option D, "limits the meaning of the word it describes," is the correct answer.