Poindexter sues Drippy Donuts, Inc. in NC over an employment issue that he claims violates a federal law, although there is no such violation under North Carolina law. He is suing for $100,000. In which of the following courts should Poindexter file his case on original jurisdiction?

a. US district court

b. state supreme court

c. us bankruptcy court

d. us court of appeals

e. state court of appeals 

do explain why?