In the Experiment by Schachter and Singer, Some Subjects Were

In the experiment by Schachter and Singer, some subjects were given a drug causing physiological arousal and were warned about the side effects of the drug (i.e., hand tremors and heart palpitations) . How did subjects who were given the same drug, but who were not warned of the drug's effects, interpret their feelings of arousal?

A) They thought that they were angry.
B) They felt happy at first, but later felt angry.
C) They didn't even feel the drug's effects at all, since they had no idea about what they were supposed to feel.
D) They thought that they were happy or angry, depending on the behavior of the confederate in the experiment.