Question

Select the sentence with a clause used as a predicate noun.

Answer 1

The reason he opened the door was that the princess pointed to it.

Answer 2

The correct answer is C.

A predicative noun is one that comes after a linking verb.

In this case, "that the princess pointed to it," is a phrasal verb actining as a noun following the linking verb "was."

In options A and B, "was" and "were" are part of verbal phrases and are not acting as linking verbs.