encountering strong competition having a long life span producing identical offspring having a diverse gene pool
I gave my students this multiple choice question: Which factor will most likely increase the survival chances of an organism living in an environment that is undergoing rapid changes?

Only one answer is correct among these 4 choices:
- encountering strong competition
- having a long life span
- producing identical offspring
- having a diverse gene pool

Could you tell me which one is correct?

having a diverse gene pool