Explanation:
The Columbian Exchange transported plants, animals, diseases, technologies, and people one continent to another. Crops like tobacco, tomatoes, potatoes, corn, cacao, peanuts, and pumpkins went from the Americas to rest of the world.... The triangular trade was the trade between Europe, Africa, and the Americas.
The anwser c should be correct
The bubonic plague caused one third (1/3) of Europe's population to meet their painful demise.
B, because when Japan attacked China, China unified to fight a common enemy.
The colonial policies and practices that played a part in peaceful or violent transitions to self-rule were very complex. One major one which had a very important role here was Apartheid. This was an important policy which had at its core racial segregation between black and white people.
