The ________ is what the sentence is about.

A) predicate
B) subject
C) sentence
D) subject
I answered Subject

Right!

b right

That is correct! The subject of a sentence is what the sentence is about. It typically indicates who or what is performing the action or being described in the sentence. In this case, the subject would be the correct answer.

To determine the subject of a sentence, you can ask yourself the question "Who or what is doing the action or being described?" The answer to that question will usually be the subject.