Which power is granted to the federal government by the United States
Constitution, but is absent from any state constitution?
A . making treaties with other nations

B. establishing and operating courts

C. passing and enforcing legislation

D. collecting taxes from citizens.

A...states cannot make treaties with other nations, only Federal Gov can do that

Explanation:

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.

when in doubt choose c

it's what my teacher told my class when we were going into psats