Since hereditarily they ought to be indistinguishable so any contrasts between them will be caused by their condition. Since indistinguishable twins create from a solitary prepared egg, they have a similar genome. So any contrasts between twins are because of their surroundings, not hereditary qualities. Late examinations have demonstrated that numerous naturally actuated contrasts are reflected in the epigenome.
Natural selection is what the process is called.I hope this helps.
Answer:
If the egg does not become fertilized, the lining of the uterus (endometrium) is shed during menstruation. The average menstrual cycle lasts 28 days.
Well C or A would work because both are polite so yeah