My brother's favorite movie of all time

Which of the following would you add to make the sentence fragment above a complete sentence?

A

a subject

B

a predicate

C

an adjective

D

a conjunction

A. a subject

This sentence already has a predicate, pretty much the whole sentence is one.

It doesn't need an adjective (a describing word) to complete the sentence.

It doesn't need a conjunction (is, and, but) to complete the sentence either.

What we need in this sentence is a subject, or a noun. What is his favorite movie?

Complete Sentence:

My brother's favorite movie of all time is (subject).