Agroup of words that function together in a sentence, but don't include both subject and verb, is a

clause
connector
modifier
phrase

D) Phrase.

Explanation: A phrase is a group of words that can be short or long, and that does not include the subject-verb pairing necessary to make a clause (which has both subject and verb). There are different kinds or phrases, like prepositional phrases (for example: on the table, after the party, etc), noun phrases (for example: the pink flower, the good friend, etc) and verb phrases (for example: were eating dessert).

the answer is a.

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