Will and Other Students Are Angry Because They Went to Canada

Will and other students are angry because they went to Canada over the summer and felt that they were treated unfairly when they were stopped for a traffic violation.They want to lobby their state legislature to pass a law forbidding any commerce with Canada by anyone in the state.Would such a law be enforceable?

A) yes, because states have the right, along with the United States Congress, to regulate trade within their borders
B) yes, because states have the exclusive right to regulate trade within their borders
C) yes, but only if the state first made a demand on Canada to remedy the situation, and Canada refused to do so
D) no, because the state would not have authority under the United States Constitution to pass such a law
E) no, but only because Canada adjoins the United States