A Professor Conducted an Experiment in Which She Asked One

Multiple Choice

A professor conducted an experiment in which she asked one group of students to keep smiling and another group to keep frowning for a certain period of time.After five minutes,the professor discovered that the students who kept smiling reported being happier than those who kept frowning.These results most strongly support the

A) drive reduction theory.
B) two-factor theory of emotion.
C) Cannon-Bard theory.
D) facial feedback hypothesis.