Why was justice roger b taney important to the states’ rights?
a. he supported justice marshall’s rulings in order to give the states more power.
c. he ignored justice marshall’s rulings in order to give the federal more power.
b. he ignored justice marshall’s rulings in order to give the states more power.
d. he supported justice marshall’s rulings in order to give the federal more power.

b. He ignored Justice Marshall’s rulings in order to give the states more power.  

Explanation:

Taney believed that freedom was extremely important and thought that concentrated power could be dangerous and threaten individual freedoms. He was against the federal government trying to regulate or control matters that, he said, threatened the personal freedom of the people. For this reason, he ignored Judge Marshall's decisions to give states more power.

so they can defeat there oppenent