As America expanded westward, the most significant debates arose over what issue? Select one:

a.
Slavery

b.
Native American removal

c.
Relations with Mexico

d.
Environmental damage

not to sure thinking it would be a hope this

  the common sense as a pamphlet written by thomas paine. it promoted the independence of the colonies from british rule. the distribution of this pamphlet was great, it reached people everywhere and it was even read aloud at places people met. it also unite the colonists before the revolutionary war.

answer is d