How did the start of colonialism in Africa?

The European imperialist push into Africa was motivated by three main factors, economic, political, and social. It developed in the nineteenth century following the collapse of the profitability of the slave trade, its abolition and suppression, as well as the expansion of the European capitalist Industrial Revolution.

i think the answer would happen to be the letter b

because the bar never runs out

couples always argue

your answer is

to dominate europe

and i know for a fact it can't be the others