Suggested that, "to be cheerful, . . act as if cheerfulness were already there."

William James suggested that, "to be cheerful, . . . act as if cheerfulness were already there." William James was a philosopher and psychologist and his theory was that if a person acted as though they were already happy, they would attract more happiness.

Ithink it's a. but i could be wrong because it might be b. but it's not the other two