Question

Select the sentence with a clause used as a predicate noun.
The man who came here yesterday was selling magazines.
We left the performance early because we were tired.
The reason he opened the door was that the princess pointed to it.

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.