Most African countries won their freedom amid the 1950's and the 1960's, either through political weight or furnished fight. The new African countries all confronted a considerable lot of similar difficulties, albeit every country has a remarkable history behind how they picked up their autonomy.
Yes, they did overpower the Aztecs and the Incas. They had more sophisticated weapons and spread a disease, known as the cold and smallpox, that was for the Aztecs. For the Incas, it was overpowered more passively, and they already were in a civil war so that weakened the Incas already. They executed the Incan empire.
The answer is C, perfect vertical lines. (north to south)