C)watching TV while eating dinner with their families.
D)using cell phones while watching TV.
Young infants can be classically conditioned most easily when
A)a conditioned stimulus is no longer paired with an unconditioned stimulus.
B)the conditioned response is fear.
C)the association between two stimuli has survival value.
D)a neutral stimulus is paired with an unconditioned response.
In regions with widespread poverty, famine, and disease,
A)either no secular change or a secular decrease in body size has occurred.
B)a secular increase in body size exists, but it is delayed.
C)increases in overweight and obesity are widespread.
D)the secular gain in height has slowed in recent decades.