How did nomads in Asia and the Middle East impact Silk Road trade? A. Controlled silk production

B. Controlled gold and salt mines

C. Connected other groups without direction interaction

D. Isolated civilizations from each other other

C

Explanation:

A would not be true because how would people traveling affect the  ammount   of silk a worm is producing?

B would be not true because they are nomads.

D would be not true because how would you isolate them when you carry goods from their lands?

answer; ///i do believe that the correct answer for the above is ( which states would be free and which states would have check first good

b) a state law could be declared illegal if it contradicted the constitution.

explanation:

the conflict of this case originated when james w. mcculloch, a cashier of the baltimore branch of the second bank of the united states that the congress had chartered in 1816, refused to pay a tax imposed by the maryland state.

in the case, the state of maryland appealed that the establishment of a second bank was unconstitutional since the constitution didn't say anything about granting that power to congress. however, the case determined that even if such right wasn't specifically stated in the constitution, it was part of the "implied powers" of the government enunciated in article i, section 8.

the case also eliminated maryland's legislation to impose taxes to a national bank, asserting that even though the states retained the power of taxation, the constitution's laws are supreme and can not be controlled by the states, therefore, if a state law contradicts the constitution, it should be declared illegal.

explanation: