The fastest way to communicate across continents in the 1500s was by ship. If you wanted to bring a certain message across a continent than there was no faster way than actually sending it on a ship and waiting for the ship to arrive safely to the other continent.
The Chinese Communist Party was able to gain the support of the peasants through their offer of a revolutionary land reform. The peasants who paid taxes and provided food, labor and military services would be rewarded with land and other forms of riches seized from the elite of the nation.
I believe in some cases because they were mixed
The correct answer is A. the spread of the AIDS virus