Which of the following best summarizes the cause of imperialism in the late 1800s

Westerners wanted to spread their religion, sell manufactured goods, and gain territory to compete with other countries

Below are the choices, the answer is D.

A. Colonial markets were closed to manufactured goods from the colonizing power.

B. Land was distributed equally among the main social classes.

C. Colonial economies became devoted to manufacturing goods for the colonizing power ...

D. The wealth of the colonizing powers often increased at the expense of their colonies