All of the following are true statements except:​

A) ​The majority of genetic variation exists within groups.
B) ​No one group is genetically distinct for any particular trait.
C) ​Differences between individual populations is greater than that between individuals.
D) ​Racial categories tend to be devised in an arbitrary manner.

Genetic Variation

The natural differences in genes among individuals of a species.

Racial Categories

Classifications of humans based on shared physical or social qualities into groups generally viewed as distinct within a given society.

Arbitrary Manner

A way of deciding or acting that is not based on system or plan, but instead on random choice or personal whim.