In China, Two Children Per Family Are Permitted from January

In China, two children per family are permitted from January 1, 2016, because the one-child-per-family rule had resulted in

A) couples not revealing the news of the birth of their second child.
B) a shortage of women who could become sexual partners and wives for the next generation.
C) driving people away from marriage and relationships.
D) couples traveling abroad to have their second child and not returning to China.