Which of the following are true statements about the fall line? choose all that apply
a. it marks the northern edge of the piedmont.
b. it is the last natural barrier for rivers on their way to the atlantic.
c. many cities have developed along it.
d. it contains large numbers of marshes and swamps

the mongolian invasion of china and central asia resulted in a disruption of the silk road as the chinese garrisons lost support from the chinese kingdoms which fell under the mongols. however, as the mongols established a formal dynasty in china, the successors of genghis khan restored the garrisons along the silk road allowing the safe travel caravans again.

the answer is aggresion hope this and mark me as brainiest and add me as friend

letter a is the answer

soviet influence spread across eastern europe sharply during and after wwii. the soviet armies liberated the countries in eastern europe and occupied them from the germans as they were forced to retreat towards germany.