Which of the following statements is true of the Unites states foeign commerce clause?
a- regualtions of foreign commerce by state government is unconstitutional
b- a state can enact a law that forbids a foriegn country from doing business in that state if the country engages in activities that are not condoned by the state
c- direct regulations of foreign commerce by the federal government violates the commerce clause
d- a state government is only permitted to regulate foriegn trade indirectly