What major agriculture practice started in the middle ages?

answer is b.

  it is always the best policy to have good communication and good relations between individuals and, specially, between leaders of the countries. for this purpose, among others, there is a common place, the united nations, where the representants can present his and learn about the other country's policies.

the anwer to

this question is false the spnaish had more than enough reinforcments and soldiders to defeat the azatecs becuase the azatecs did not have the advanced technolgy the spanish did