What is one effect of the pollution of the Chiang Jiang River? (51A DOK 2) O A. Acid rain is damaging China's forests and structures.
O
B. Smog is a large problem in China's rural communities.
O
C. Many Chinese citizens lack access to safe drinking water.
O.
D. Many Chinese cities have dangerous levels of air pollution.

i believe it d) heterogeneous

russia because it is the biggest state

the exodus of these people from constantinople contributed to the revival of greek and roman studies, which led to the development of the renaissance in humanism and science. byzantine emigrants also brought to western europe the better preserved and accumulated knowledge of their own greek civilization