China under the tang dynasty

a. was conquered by arab forces from central asia.

c. forced vietnam, tibet, and korea to become tributary states.

d. conquered the mongol empire defeating kublai khan.

just finished this it is b. centrifugal force

basically means the stoc market is going down since   dow is one of the most sucessful buiness it would be a tragedy for it to go down and it ensures the ruinty of the stock market

a element i know of that abused the power was the taxes the taxes were very heavy due to the war.