In the sentence "George Washington Carver, the son of slaves, became an agricultural innovator" the word that is the predicate nominative is "son." Option D is correct.
A predicate nominative, also known as a predicate noun, is a word or group of words that completes a linking verb and renames the subject. The predicate nominative is a noun or a pronoun. It is a complement or completer because it completes the verb.
