I don't see any following options to answer your questions.
Predicate nominative is also popularly known as the predicate noun. It is a noun, a pronoun or any nominal that follows the linking verb and most of the time the form of the verb be. It links or completes the linking and change the name of the subject. It complements or completes the verb in the sentence. However, predicate nominative completes only linking verbs. Predicate nominative can be compound while some do not have one. Therefore in the sentence "Sugar is the main ingredient in taffy", the predicate nominative is "ingredient".
Stephen Blackpool is a worker that works in Josiah Bounderby’s factory. Because of that, they have a contrast, Blackpool is a poor worker that fights to recover his name after he is falsely accused of robbery. On the other hand, Bounderby is the owner of the factory, he lives for wealth and self-interest. These two characters show the relationship between rich and poor and represent the society we live in. And the fight between factory owners and workers unions.
