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.