Question

Choose the answer that best describes the pronoun's use in the sentence.

The fans yelling loudest are they. (Points : 5)
subject
direct object
predicate nominative
object of a preposition

Answer 1

The answer that best describes the pronoun's use in the sentence is subject. Just invert the sentence:
They are the fans yelling loudest.
Now you see that the pronoun is obviously the subject.