The Fact That People from Some Cultures Lack an Enzyme

Multiple Choice

The fact that people from some cultures lack an enzyme to allow them to digest milk reflects that

A) cultural practices can affect human evolution.
B) cultural practices are shaped by the local geography.
C) people from different cultures differ more in terms of their genes than they do in terms of their cultural practices.
D) there is no clear distinction between genetic evolution and cultural evolution.
E) genetic differences are difficult to overcome.