Political instability would be your answer
What’s the whole question asking what are the options??
It is absolutely true that China is seeking to lessen its dependence on coal by developing more hydro power resources. The correct option among all the options given in the question is the first option. China is blessed with natural rivers and it is slowly trying to reduce its dependence on coal powered plants to hydro power plants. This is also a great step towards reducing air pollution.
I think the answer youre looking for her is A
But, the runoff from the land causes water pollution and the methane in their feces causes air pollution and all in all can cause acid rain.
But i'd say they want answer A
