Aztecs built chinampas ('floating gardens') in order to provide additional farm lands (answer C). The idea was to grow crops in small rectangular areas (ci. 30 x 2.5 m) on shallow lake beds. Aztecs began to use chinampas in Tenochtitlan in about 1250 AD.
The best option from the list would that "<span>C. Factories employed more people, including women and children, for lower wages and longer hours," since the supply of labor was so great. </span>
Answer:
1). South Africa, Namibia and Angola
2). Kenya, Nigeria, Somali land