Soon after the Columbian Exchange began, European ships carried potatoes from the Americas to Europe. Which was an intentional consequence of that action? A. Over a million Irish died in the famine that resulted when the Irish potato crop, the major source of food and income for Irish farmers, was destroyed by a blight. B. People in northern and western Europe started planting and eating potatoes as an important source of nutrition. C. Europeans boycotted potatoes as a means of showing their disapproval with the working conditions of native laborers. D. Potatoes replaced wheat and barley as profitable crops in central and southern Europe.

Let's look at the options with respect to whether they could have been intentional:

A. Over a million Irish died in the famine that resulted when the Irish potato crop, the major source of food and income for Irish farmers, was destroyed by a blight.

-this could by no means be intentional!

B. People in northern and western Europe started planting and eating potatoes as an important source of nutrition.

-yes, this is the correct answer: they would want to introduce new, effective nutrition sources into Europe.

C. Europeans boycotted potatoes as a means of showing their disapproval with the working conditions of native laborers.

-carrying potatoes would not be compatible with a boycott, not the right option,

D. Potatoes replaced wheat and barley as profitable crops in central and southern Europe.

- I don't think this would be their intention, rather they would want potatoes to be planted along the other plants.