In One of Fredrickson's Studies, College Students Became Very Nervous

In one of Fredrickson's studies, college students became very nervous after they were told they had one minute to prepare a speech to give in front of their peers. After preparing their speeches, students were assigned to different conditions to watch films with a neutral, positive, or negative emotional content. The findings of this study supports the value of positive emotions

A) in broadening our thinking because students in the positive emotion film condition gave better speeches.
B) in undoing the effects of negative emotions because of the faster rate of return to baseline heart-rate among students in the positive emotion film group.
C) in increasing personal satisfaction because students in the positive film group were more satisfied with the speeches they gave.
D) in undoing the effects of negative emotions because students in the positive film group obtained more positive support from other students.