Which of the following best explains the changes in China’s population shown in the table above? Immigration to China increased due to religious persecution of Buddhists in India and Southeast Asia.

Immigration to China increased due to religious persecution of Buddhists in India and Southeast Asia.
A

Agricultural output increased as a result of the use of the new crop strains, iron plows, and expanded irrigation.

Agricultural output increased as a result of the use of the new crop strains, iron plows, and expanded irrigation.
B

Less warfare with neighboring states and nomadic peoples also meant fewer casualties in wars and a population increase.

Less warfare with neighboring states and nomadic peoples also meant fewer casualties in wars and a population increase.
C

The Confucian emphasis on the importance of family led many Chinese to have more children.