Answer:
i dont know these things sorry
The answer is push theory, it is because a push theory is a means of having something for an individual to strive or to be motivated into reaching his or her goal; for it to be considered as a pull theory, the individual should move on its own without having any rewards or factors moving him or her to a certain goal.
Invasions by Barbarian tribes
The correct timeline is
B. Two
1. European trading posts- slave trade 264 – 146 BC
2. Arab traders bring Islam to North Africa 711 CE
3. European colonies established by Berlin Conference. 1884 CE
4. Scramble for Africa 1884 CE
5. African nations gain independence. 1960 CE