Why were European nations colonizing throughout the world?

The motivations for the first wave of colonial expansion can be summed up as God, Gold, and Glory: God, because missionaries felt it was their moral duty to spread Christianity, and they believed a higher power would reward them for saving the souls of colonial subjects

Explanation:

The motivations for the first wave of colonial expansion can be summed up as God, Gold, and Glory: God, because missionaries felt it was their moral duty to spread Christianity, and they believed a higher power would reward them for saving the souls of colonial subjects; gold, because colonizers would exploit resources

a is the answer i believe.