What types of foods became staples in different parts of the world with the Columbian
Exchange?

corn, potatoes, cassava, and sweet potatoes, together with secondary food crops such as tomatoes, peanuts, pumpkins, squashes, pineapples, and chili peppers.

Explanation:

The Columbian Exchange was more evenhanded when it came to crops. The Americas' farmers' gifts to other continents included staples.  

answer; ///i believe that the correct answer is (a) the great depression

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering