Although the Chinese Government's Population Policies Were Successful,they Have Had

Although the Chinese government's population policies were successful,they have had some unintended consequences,one of which was that:

A) a highly skewed sex ratio where women outnumber men will lead to low rates of marriage among the least desirable men
B) low birthrates will not provide enough adult children to care for their aging parents
C) more parents will abort male fetuses or put infant sons up for adoption
D) parents are never allowed to have more than one child.
E) All these are unintended consequences of the population policies.