In One Study Described in the Text,Paul Ekman and Colleagues

In one study described in the text,Paul Ekman and colleagues (1987) secretly videotaped American and Japanese students as they watched repulsive film clips.In one condition,a researcher was present while the students watched the clips; in another condition,no researcher was present.What did Ekman and his colleagues find?

A) In both conditions,American and Japanese students were equally likely to conceal their negative emotional expressions.
B) In both conditions,Japanese students were more likely than American students to conceal their negative emotional expressions.
C) Japanese students were more likely than American students to conceal their negative emotional expressions in the presence of a researcher,but not in the absence of a researcher.
D) In both conditions,American students were more likely than Japanese students to conceal their negative emotional expressions.