After 1850, which reform movement began to overshadow others?

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.

(b) britain had a much larger navy than the u.s.

(d) the u.s. had a small army compared to britain.