Gregor and McPherson's (1965) Research Suggests That Cross-Cultural Differences in Visual

Gregor and McPherson's (1965) research suggests that cross-cultural differences in visual illusions could depend more on:

A) Nature: the group's genes
B) The group's physical environment than on training and education
C) Training and education alone
D) The group's physical environment alone
E) Training and education than on the group's physical environment