Answer:
The Wilmot Proviso was designed to eliminate slavery within the land acquired as a result of the Mexican War (1846-48). Soon after the war began, President James K. Polk sought the appropriation of $2 million as part of a bill to negotiate the terms of a treaty.
Explanation:
So I believe the answer is A; a bill which limited the impact of the Mexican-American War on slavery the Compromise of 1850.