Barring Ethical Considerations,what Is the Best Way to Test the Idea

Multiple Choice

Barring ethical considerations,what is the best way to test the idea that facial features are influenced by environment instead of by biology?

A) raise genetically identically individuals in contrasting environments
B) raise genetically diverse individuals in the same environment
C) measure the facial features of different groups within the same environment
D) measure the facial features of one group living across multiple environments