Which population is likely to have the most genetic variation among its members?

I believe its americans

The answer is A.

A. population with many different traits mist likely has many alleles of a particular gene for a particular trait

Explanation:

The environmental impact on the different genotypes, therefore, provides the diverse phenotypic traits. Genetic variability is significant in that it improves the chance of durability for the population. Genetic variety also decreases the rates of unfavorable acquired characteristics by decreasing inbreeding.