The answer... I think is C... hope it helped :)
Usually, it's to search for resources (such as crops, gold, land, etc) and to conquer land for themselves.
Europeans primarily established colonies in Africa and Mexico during New Imperialism.
New imperialism constituted the period in which European made various efforts to gain new territory following the industrial revolution.
Africa and Mexico became their main target for Europe due to the richness in terms of natural resources that were prominent during Industrial Revolution. Africa was rich because of its metal reserves whereas Mexico was rich because of its crops and oil.
The answer is A. They were trying to limit government control.