The Yale Attitude Change Approach to Persuasion Yielded a Great

The Yale Attitude Change approach to persuasion yielded a great deal of information about the attitude change process,but there was one major problem with the approach;

A) it was not clear when one factor should be emphasized over others.
B) it only accounted for implicit attitudes.
C) it only applied to women between the ages of eighteen and twenty-five.
D) it is unclear as to who exactly is a source and who is an audience member.