Which of the following is the main duty of the federal court system?
a. to make law
b. to enforce law
c. to interpret law
d. to enact law

The main duty of the federal court system is:

c. interpret law

Explanation:

Courts in general are usually consulted in times of disputes between individuals, states or even companies. The courts are mandated to solve the disputes and punish appropriately where applicable. The courts fall under the judiciary arm of the government whose sole duty is to interpret and apply the law. The executive's role is to govern by enforcing the law into effect after it has been written by the legislature and interpreted by the judiciary. The legislature is also an arm of the government whose major purpose is in making the law. The laws usually go through a process in congress where it has to be passed through popular vote, then if majority are for the law it is taken to the president. If the president signs the law into effect then it is enforceable.

The federal court system, under the federal judiciary works independently from the legislature and executive branches, yet regularly works with them as the Constitution requires.  The federal court system deals with the interpretation of the law and usually is sought out for further clarification on the understanding of the law. The federal court system is also consulted when different states have a dispute.

the answer is account d