The Wilmot Proviso called for new states to allow slavery in the Southeast.
a ban on slavery in territories gained from Mexico.
new settlers to vote on slavery in the Southwest.
an extension the Missouri Compromise dividing line.

The answer is B.

Explanation:

According to Wikipedia, The Wilmot Proviso was an unsuccessful 1846 proposal in the United States Congress to ban slavery in territory acquired from Mexico in the Mexican–American War.

-an amendment is proposed.

-two-thirds of congress must approve.

-thee-quarters of states must approve.

-the proposed amendment becomes law.

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deflation   hope this