State governments may do all of the following except:
a. allow the sale of firearms
b. require professionals to have licenses
c. control the sale of alcoholic beverages
d. impose tax on imports

i think it's d but i am not sure.

the us constitution is a living document, meaning that it can be changed over time as the country changes.

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.