What was a benefit of uniting upper and lower Egypt? A. the economy began to grow.

B. the capital remained the same.

C. a strong military was no longer needed.

D. the government because less powerful.

i need help

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 actually b.   as habitats are destroyed, animals and plants may become extinct.   , according to edge nuity