Which of the Following Best Describes Why the Concept of Ethnicity

Which of the following best describes why the concept of ethnicity is more valuable in studying human behavior than is race?

A) The concept of race includes too many genetic variables to be valuable in research. Ethnicity is determined by only one pair of chromosomes.
B) Race explores commonalities due to environmental factors such as common backgrounds, beliefs, and allegiances, and therefore includes too many variables to control.
C) Ethnicity is easy to study because it explores only the commonalities between people of the same race.
D) Ethnicity explores commonalities due to environmental factors such as common backgrounds, beliefs, and allegiances. Race is determined solely by genes.