In the late 1800s, imperialist countries often used their colonies as sources of labor for their factories.
sources of manufactured goods.
markets for their natural resources.
markets for the products they produced.

d. markets for the products they produced

Explanation:

Just took it 2020

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

explanation: