How have urban singleton daughters benefitted from the one-child policy

There are less children to feed, therefore there is more level of education and attention on every single newborn. (Ex: a low income mother is not able to raise 4 duaghters as good as only having one)

the story goes that because of this belief, constantine was able to defeat his foes. constantine became an ardent1 christian. christianity and other religions were tolerated under constantine's rule. constantine also was responsible for the building of a great cathedral in rome.

i think the answer is b.