Identify the grammatical function of the bolded noun clause in this sentence:

Question

Will's problem was that he didn't know how to register for classes.
Responses
A subjectsubject
B direct objectdirect object
C predicate nominativepredicate nominative
D object of a preposition

Answer 1

The bolded noun clause "that he didn't know how to register for classes" functions as the predicate nominative in the sentence.

So the correct answer is: C predicate nominative.