How did european imperialism following the industrial revolution differ from earlier forms of imperialism?

Below are the choices. The answer is D. I hope it helps. 

A. It was based on military power rather than economic power.
B. It was less widespread and more focused on dominating small areas.
C. It was used in Africa and Asia rather than only the Americas.
D. It was less concerned with conquering and governing territories.

D. It was less concerned with conquering and governing territories.

The growth of the empire continued to increase their confidence.