What did the marshall court rulings that supported the sanctity of contracts and federal law over state law boost?

a. a national economy and a strong federal government
b. the rights of workers
c. the power of employers
d. foreign trade and a balanced federal budget

The correct answer should be A. a national economy and a strong federal government

They supported that a national economy should exist because a single state that did was it wanted could harm the economy for all other states. In addition, a strong federal government would ensure that the economy is protected and that all states play fairly.