What Was the Main Difference Between Colonialism and Imperialism

What was the main difference between colonialism and imperialism?

A) Peoples subject to imperialism developed an articulate and organized opposition, while colonized peoples seldom coordinated opposition movements.
B) Unlike colonialism, imperialism was a more aggressive and more directly exploitative form of political domination.
C) Colonialism typically involved settlers dependent on slave labor, whereas imperialism involved more indirect forms of economic exploitation and political domination.
D) Unlike colonialism, which was motivated by European greed, imperialism focused on exerting cultural rather than economic hegemony.