Answer:
The correct answer is <u>C</u>: predicate nominative.
Explanation:
Will's problem was <u>that he didn't know how to register for classes.</u>
Predicate nominative represents a group of words that completes a linking verb and renames the subject. A predicate nominative can be found after a linking verb.
In our example, the subject would be <em>Will's problem</em>, the linking verb would be <em>was</em>, while the rest of the sentence would represent a predicate nominative.
No picture attached [error]
If you look into it there are more creepy similarities between them :)
