If There Is an Area of Interstate Commerce That the Federal

If there is an area of interstate commerce that the federal government has chosen not to regulate,the states can:

A) regulate without restriction in that area.
B) regulate in that area so long as the state law does not unduly burden interstate commerce.
C) regulate in that area so long as it first gets the requisite approval from Congress.
D) not regulate in that area because states cannot pass laws affecting interstate commerce.
E) not regulate in that area, because the federal government's decision to not regulate in an area implies that there is to be no regulation in that area at any level.