Explanation:
I don't no ask a docter ok
Twins can either be Mono-zygotic (Identical) Which means they develop from one zygote which splits and forms two embryos, or Di-zygotic (fraternal) meaning that each twin develops from two different eggs and each egg is fertilized by a different sperm cell.
I am not sure which one may be your answer.
But
I Hope This Helped!
Talking to a trusted person about stress is expressing oneself and seeking support.
The answer is c. the pollution or smog level