The us supreme court is the a. middle court in the federal judicial branch. b. middle court in state judicial branches. c. highest court in the federal judicial branch. d. highest court in state judicial branches.

c. Highest court in the federal judicial branch.

Explanation:

The Supreme Court of the United States is the highest court in the federal judicial branch. This court has appellate jurisdiction over all federal and state cases, and original jurisdiction over a small number of cases. It also has the power of judicial review. This is one of the court's most important powers, as it allows it to determine whether a law or statute violates the U.S. Constitution.