Select the letter of the term that correctly identifies the function of
the word or phrase in parentheses in the following sentence:
Some exhibitors at the rock shows are professional (geologists).
a. direct object
b. indirect object
c. object complement
d. predicate nominative
e. predicate adjective
c. object complement
The correct answer is e. predicate adjective
In the given sentence, the phrase "(geologists)" modifies the subject "exhibitors" and describes what kind of exhibitors they are. As a result, it is functioning as a predicate adjective.