Physiologically, with mild unpleasant stimulation, the sympathetic division of the autonomic nervous system is more active, and with mild, pleasant stimulation, the parasympathetic division is more active

Secondary reinforcers and punishers are sometimes called conditioned reinforcers and punishers

Indicate whether this statement is true or false.

Since 1980, the adult obesity rate in the United States___

a. has doubled b. has increased by tenfold c. has tripled d. has increased by 25%