Answer:
c. the cookies smell [quite delicious].
Step-by-step explanation:
An adjective phrase is a sentence or a series of words that describe the noun or the subject of the sentence, this means it gives you a better understanding of the poperties of the subject or noun of the sentence, in this case the adjective phrase is "quite delicious" since the adjective is not only delicious, is also the quite involved, this is an adjective phrase.