B. Pax Mongolica. In Pax Mongolica, there is relative peace that happened after Kublai Khan was killed. Resulting to this, the re-opening of Silk Road gave way to transfer to culture, tradition, and trades, and religion.
The letter B represents china
D, it's logical. A desert cant be destroyed by humans, it's impossible.
Carnegie used his money to build libraries both in the U.S.
as well as other countries so that people would benefit from others in terms of
knowledge. He also helped establish
schools so that more people will have access to education.
