PT 5 S3 Q17

Being articulate has been equated with having a large vocabulary. Actually, ... ...

Which one of the following is an assumption made in the argument?
(A) When people are truly articulate, they have the capacity to express themselves in situations in which their vocabularies seem inadequate.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Necessary Premise: Intro Set