In a proposition, the subject is always:

A) the meaning of the proposition, taken as a whole
B) a term that tells us what something is doing
C) a term that refers to something or a class of things
D) the first word of the proposition
E) the last word of the proposition

Subject

The person or thing that is being discussed, described, or dealt with in any given context.

Proposition

An expression of some truth or principle presented for acceptance or rejection.

Term

An expression or word used in logic or mathematics to represent a specific concept, quantity, or entity.