Equivalent propositions must have the same:

A) number of words
B) subject
C) predicate
D) word order
E) meaning

Equivalent Propositions

Statements that are logically the same, in that they have the same truth value in every model or situation.

Predicate

In grammar, the part of a sentence or clause that states something about the subject and usually consists of a verb, and can include objects and modifiers.

Meaning

The significance, definition, or implication of a word, phrase, sentence, or symbol.