Who is the 2nd president of the united states

President John Adams was the 2nd president of the United States of good ol' America. :)

the  wilmot proviso  was designed to eliminate  slavery  within the  landacquired as a result of the mexican war (1846-48). fearing the addition of a pro-slave territory, pennsylvania congressman david  wilmot proposedhis amendment to the bill.

the answer is d. selective incorporation. (apex)