The answer is, or should be, B. An 'adjective phrase' (or adjectival phrase) is a phrasewhose head word is an adjective, e.g. fond of steak, very happy, quite upset about it, etc.
Answer:
is this supposed to be a poem
Explanation:
C. an understood you, because usually you is the subject in the sentence, but it is understood without it.
To instruct, she is showing students how to do something
