What was the fundamental question addressed in each of these congressional acts- the missouri compromise, the compromise of 1850, and the kansas-nebraska act?

A.should the U.S expand westward
B.SHould states be allowed to nullify federal laws
C.should slave labor be allowed in new states
D.Should states be able to secede from the union

A. should the U.S expand westward - The fundamental question addressed in the Missouri Compromise, the Compromise of 1850, and the Kansas-Nebraska Act was whether new states admitted to the Union should allow slavery, ultimately addressing the issue of whether the U.S. should expand westward with or without slavery.