Answer:
Either, but if you need to pick one it would be noun.
Explanation:
The predicate nominative (or predicate noun) is the noun or pronoun that comes after a linking verb. It renames the subject of the sentence. The sentence should still make sense if you switch the predicate nominative and the subject.
D does not provide good support.
Answer:
Today I went to the zoo. I saw a (silly) (Monkey) jumping up and down in its tree. He (run, ran) (quickly) through the large tunnel that led to its (cozy) (nest). I got some peanuts and passed them through the cage to a gigantic gray (elephant) towering above my head. Feeding that animal made me hungry. I went to get a (delicious) Scoop of ice cream. It filled my stomach. Afterwards I had to (leave) (early) to catch our bus. When I got home! (hug, hugged) my mom for a (wonderful) day at the zoo.