The presence of others does not always lead to social facilitation because:_____.
a. an increasing familiarity with novel stimuli facilitates liking.
b. the loss of self restraint often accompanies arousal and anonymity.
c. one's focus of attention shifts when playing the role of actor rather than observer.
d. arousal encourages performance of the most likely response.
e. group discussion enhances whatever attitude is initially dominant in the group.