Question

what is the best evidence for the notion that sociocultural forces play a role in handedness?
a. only 12 percent of the population is left - handed.
b. right - handed parents tend to have right - handed offspring.
c. in american culture, most desks and scissors and golf clubs are made for right - handers.
d. when social attitudes change, the incidence of left - handedness changes.

Explanation:

This option directly shows a link between social factors (social attitudes) and handedness (incidence change), indicating sociocultural influence. Options A and B are about population percentages and genetic trends respectively, and option C just shows cultural products for right - handers without indicating a change in handedness due to sociocultural factors.

Answer:

D. When social attitudes change, the incidence of left - handedness changes.