The stalemate that developed along the Western Front during World War I was largely the result of both sides:
O
A. employing trench warfare techniques that made it difficult to
capture territory
B. focusing on controlling the seas with their navies rather than
fighting on land.
C. constantly moving their armies between the Eastern and Western
Fronts.
D. refusing to risk heavy casualties by sending their soldiers into no-
man's-land.

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.

protected civil liberties and outlawed slavery in the new territories.

the correct answer is c.