Schacter and Singer conducted an experiment in which students were injected with epinephrine. Half the students were told the injection might produce some general arousal; the remaining students were not informed about any potential reactions. Students then waited in a room with another student. Schacter and Singer found that:

a. all the students who waited with a euphoric student became playful
b. all the students who waited with an angry student became irritated
c. all the students who were informed about the potential side effects became irritated, no matter who they waited with
d. the students who were not informed about potential side effects tended to adopt the mood of the other student who waited with them

D