Explanation:

Plants which were domesticated in the New World (i.e., the Americas) and then introduced into the Old World (e.g., Europe, Asia, Africa).

1. Tobacco - Domesticated in the New World and introduced to the Old World.

2. Cocoas - Domesticated in the New World and introduced to the Old World.

3. Rubber - Native to and first domesticated in the New World and later introduced to the Old World.

4. Sugarcane - Originally domesticated in New Guinea and then spread to the Old World, particularly Asia, before the European discovery of the New World. So, it's not from the New World.

5. Wheat - Domesticated in the Old World, particularly in the Fertile Crescent (modern-day Middle East). So, it's not from the New World.

6. Coffee - Native to and first domesticated in the Old World, particularly in the region of Ethiopia.

Given the options, the plants that were domesticated in the New World and introduced to the Old World are:

1. Tobacco
2. Cocoas (Cacao)
3. Rubber