Answer:
The correct answer is B: ban slavery in land obtained from Mexico
Step-by-step explanation:
The Wilmot Proviso was an unsuccessful 1846 proposal in the U.S. Congress.
In 1846 it passed the House as an amendment to the $2,000,000 appropriations bill to negotiate the end of the war, but failed in the Senate.
In 1847 it was reintroduced but also passed the House and failed in the Senate.
Finally, in 1848, an attempt was made to make it part of the Treaty of Guadalupe Hidalgo, but it also failed. Political controversies over slavery in the southwest persisted until Compromise of 1850.