Fierra inc. is a german automobile manufacturer that has a 5 percent market share in the united states' automobile market. the company has a unit in north carolina that imports fierra automobiles from its parent company in germany and assembles them. which of the following measures is in accordance with u. s.a.'s foreign commerce clause?

a) the government of north carolina imposes an additional 10% tax on fierra cars.
b) the government of georgia bans the sale of fierra cars.
c) the government of north carolina asks fierra inc. to shut down its import unit in the state.
d) the federal government imposes an additional 100 percent tax only on fierra cars being sold in north carolina.