This is a predicate adjective, as it immediately follows a copulative (=linking) verb "to grow". If it said - The tall grass, then "tall" would be nominative. This way it isn't, it is a predicative adjective.
Answer:
It would be SUBJECTIVE. I tried objective from other peoples answers and they were WRONG!!
D.) The American Dream is empty and superficial
I think the answer is OC because in variable line poetry, the intention is to produce this contrast consciously and to produce a rhythm of shorter and longer lines, like the rhythm of shorter and longer sentences.