The Fallacy of Subjectivism Is

The fallacy of subjectivism is:

A) assuming that an argument is about yourself, rather than someone else
B) focusing an argument on a point that is unrelated to the one you're trying to prove
C) assuming that everyone will agree with an argument, even though it is controversial
D) talking about too many things in an argument instead of focusing on one subject
E) holding that something is true merely because we want or believe it to be true