As suggested by the " hypothesis," the cessation of the menstrual cycle while a female is at full physical capacity allows her to devote precious time and resources (namely food and knowledge) to their adult children, which in turn allows them to be better parents.

Grandmother hypothesis

Explanation:

The grandmother hypothesis is the result of a further developed mother hypothesis. The mother hypothesis suggests that the energy required to keep a woman fertile is better used in order to ensure that her offspring reproduce.

The grandmother hypothesis suggests that the grandmothers bolster the efforts of the mothers and make sure that their grandchildren's genetic interests are met. The grandmothers' can also increase the grandchild's social circle further increasing their chance to mate.

d.) continue to rise rapidly