Answer:
. B.Only federal courts handle cases between citizens of different states.
Step-by-step explanation:
The American Constitution delegates that each state has the power to institute its own legal system independently, that is, each state has its own constitution.
Thus, citizens who need to bring justice to their own state must use the state courts. However, for cases where the parties are from different states, the process must be effected by a federal court. This is necessary to prevent one party from feeling prejudiced. Moreover, it would be impracticable for lawyers to know the laws of all states.