To what extent was the columbus exchange a good thing?

Three "good" things that emerged from the Columbian exchange from a European perspective was that (1) the potato rich in vitamins and minerals and easy to cultivate became a staple of the European diet and helped to make Europe famine-proof and led to its population growing (2) manioc (bread) in Africa also touched off the growth of the population there (3) sugar cane and rice drove the growth of the slave plantation economies in North and South America  and this had tremendous effect on Europe's wealth and spawned capitalism.

Explanation:

the answer is b hope that