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".
It means don't be expecting much. When people hold their breath, they are waiting for something to happen. WHen people give the advice of dont hold your breath, they are saying taht there isn't anything going to happen
not sure if this is right but id go with d