Winston Churchill was not worried about America since he knew they had strong industrial power
If I am not mistaken, it was the space program also know as the Apollo Program a.k.a Project Apollo
During 1200-1450, Mali, a big empire in west Africa flourished. Timbuktu, a city in this empire had a huge library with tens of thousands of books. This library provided their empire a lot of wealth. During 1400-1750, during the Atlantic slave trade, millions of African people, mostly men and some women, were transported to South America via the Atlantic Ocean. The rulers of West Africa negotiated with European rulers to send off their Africans. In exchange, the Europeans gave them silver which boosted the wealth in their economy.
Your answer is most likely:
<span>D. to fill the large need for workers on sugar plantations</span>
