Arestrictive clause is one that a. limits the meaning of the word it describes. b. functions as an adverb. c. usually occurs at the beginning of a sentence. d. should be set off by commas.

Your answer is A.) Limits the meaning of the word it describes. A restrictive modifying clause (or essential clause) is an adjective clause that is essential to the meaning of a sentence because it limits the thing it refers to. The meaning of the sentence would change if the clause were deleted. Because restrictive clauses are essential, they are not set off by commas.

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