The ancient Chinese settlements along the Huang He were not affected by cultural diffusion because they were . A. isolated B. attacked C. conquered D. annexed

A.

Explanation:

The ancient Chinese civilization was protected from invasion and cultural diffusion because of the geographical isolation. The ancient Chinese civilization was isolated by desert from the north and west, and the Pacific Ocean to the east.  

The settlements along the Huang He river were not affected by cultural diffusion because they were isolated by the Gobi desert to the north, which kept people from invading the land.

Therefore, option A is correct.

name two ways organisms join a population and two ways organisms leave a population. two ways organisms join a population are birth rate and immigration. two ways they leave are death rate and emigration.

explanation:

c) troops march forward in close formation against newer, more accurate weapons