the population is small. migration into the population is occurring. immigration into the population is occurring. the population is large.
I gave my students this multiple choice question: The Hardy-Weinberg law is only valid when

Only one answer is correct among these 4 choices:
- the population is small.
- migration into the population is occurring.
- immigration into the population is occurring.
- the population is large.

Could you tell me which one is correct?

the population is large.