Why Should the United States Be Concerned with the Fact

Why should the United States be concerned with the fact that the Chinese workforce aged 20 to 24 will shrink by 50%?

A) Fewer Chinese will immigrate to the United States.
B) More jobs from the United States will move to China, leaving fewer jobs for Americans.
C) Overall fertility in China will increase with repercussions in the United States.
D) Chinese workers will get higher wages, which will increase the cost of the goods.
E) Overall, goods and services will cost less than they do now.