When foreigners made contact with the chinese, the chinese

Which is likely the most serious problem associated with an epidemic? 1. there are sometimes no cures to the diseases that spread. 2. people often die from the diseases that spread. 3. there are usually no ways to prevent people from getting ill. 4. people often don’t know they have a disease.

Who was the top of the feudal system hierarchy

What factor aided the russians in defeating napoleon's troops?