At the time of the constitution convention. The constitution gave congress the authority to veto state laws

False

Explanation:

During the Constitutional Convention, several ideas were thrown around for what the Constitution should look like including the Virginia plan. The Virginia plan called for several things in the Constitution today such as the Bicameral legislature that the U.S. currently has.

It also however, called for Congress to be able to veto state laws. This was rejected by the Convention as most delegates believed that states should be able to be independent of the Federal government.

the navigation act prevented the colonies from exporting to countries other than britain and it prevented the importation of goods by other countries as well. so i believe the correct answer is d. other nations could not deliver goods to the colonies.

hope this .

because the vietnam war was fought in an especially brutal and untraditional way