Why Did China Recently Begin to Loosen Up Its One-Child

Why did China recently begin to loosen up its one-child policy?

A) to meet conditions for participation in the Shanghai Cooperation Organization
B) to provide care for its aging population
C) to minimize impending labor shortages
D) to minimize impending labor shortages and to provide care for its aging population
E) to minimize impending labor shortages and to provide care for its aging population as well as to meet conditions for participation in the Shanghai Cooperation Organization