When a population is split into smaller groups, why do these groups develop different traits? A. Traits that form in one group form evolutionary forces quickly spread through populations
B. Separating the two groups decreases the chance that the two groups will diverge
C. Gene flow is increased in the two subgroups that are formed
D. Forces like natural selection and genetic drift affect the genes of the two subgroups differently

If I was to guess, It would be D

D. Forces like natural selection and genetic drift affect the genes of the two subgroups differently

Explanation:

I just did the question and that answer was right

A.P.E.X.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this