The Wilmot Proviso, introduced into Congress during the Mexican War, declared that
A) Mexican territory would not be annexed to the United States.
B) slavery would be banned from all territories that Mexico ceded to the United States.
C) the United States should annex all of Mexico.
D) the United States should have to pay Mexico a financial indemnity for having provoked the war.
E) slavery in the territories would be determined by popular sovereignty.
Answer: B