A recent air quality study conducted by the World Health Organization showed that 7 of 10 of the world's most polluted cities are in China. What is the MOST LIKELY effect of such pollution on the people of China?

Responses
A The Chinese population is moving from urban to rural areas to escape the pollution.The Chinese population is moving from urban to rural areas to escape the pollution.
B The water sources of the nation are being severely damaged as a result of the air pollution.The water sources of the nation are being severely damaged as a result of the air pollution.
C The Chinese government is cooperating with the United Nations to solve the pollution problem.The Chinese government is cooperating with the United Nations to solve the pollution problem.
D Respiratory and heart disease related to air pollution are the leading causes of death in China.

D Respiratory and heart disease related to air pollution are the leading causes of death in China.