Wells and Petty (1980)videotaped Students as They Listened to a Speech.The

Wells and Petty (1980) videotaped students as they listened to a speech.The results of this study indicated that

A) students revealed the intensity,but not the direction,of their attitudes through their body language.
B) students' self-reported attitudes did not agree with their observed attitudes.
C) students signaled their attitudes by nodding or shaking their heads.
D) horizontal head movements indicate agreement,whereas vertical head movements indicate disagreement.