Why Did Levenson, Ekman, Heider, and Friesen (1992) Ask Members

Why did Levenson, Ekman, Heider, and Friesen (1992) ask members of the Minangkabau tribe in West Sumatra to pose various facial expressions?

A) To see if people from other countries would be able to recognize the basic facial expressions when they were produced by unfamiliar faces
B) To see if people from pre-industrial cultures know how to produce basic facial expressions
C) To see if the facial feedback would cause systematic changes in their physiology similar to the changes observed in North American subjects
D) To see if posing different facial expressions would lead the subjects to behave in emotion-congruent ways, according to the predicted action tendencies for each emotion
E) All of the above