Professor Morooka works 60 hours a week for 9 months of the year. During this time he longs for a break. When he finally gets a break, he misses the sense of accomplishment he feels when he is working. ________ theory suggests that this is because there is an optimal level of arousal that we all try to maintain.a. arousal
b. habit
c. instinct
d. Schachter-Singer
