How did the imperialism of africa affect the politics of africa?

Imperialism in Africa was the period in which European powers had control over the contries in Africa. It's effects today are:

- European powers have exported a lot of natural resources from Africa
-Most African countries have a European language as one of its official languages
- the borders of African countries don't follow the ethnic lines, which causes ethnic tensions. 
- a number of which people have settled in southern part of Africa, which leads to racial tensions today.

A, c, and d are the answers