4. because if other countries deny what happened they do not learn from it and it can happen again 5 look for facts do your own resheach and don't take any information for granted (too late lol)
democracy, where everyone elects a leader
Answer: I would say D or B
Explanation:
The exchange introduced a wide range of new calorically rich staple crops to the Old World—namely potatoes, sweet potatoes, maize, and cassava.