In the Early 20th Century, Anthropologist Franz Boas Described Changes

In the early 20th century, anthropologist Franz Boas described changes in skull form among the children of Europeans who had migrated to North America. He found that the reason for these changes could not be explained by genetics. His findings underscore the fact that

A) observing changes over one generation is not enough to make conclusions about changes in genotype and phenotype.
B) phenotypic similarities and differences don't necessarily have a genetic basis.
C) describing changes in skull form is the most accurate way to study the impact of migration on traveling populations.
D) though the environment influences phenotype, genetics is a more powerful determinant of racial differences.
E) diet affects which genes get turned off and which on, resulting in a particular phenotypic characteristic.