Corn and potatoes, both American crops, revolutionized the European diet.

a. True b. False

TRUE

Explanation:

the statement is TRUE

corn and potatoes revolutionized European diet as earlier Europe has to suffer from many diseases such as tuberculosis, scurvy, measles, dysentery, etc. the mortality rate in Europe was also very high.

But due to the production of potatoes and corn, these diseases decline the mortality rate of the people of Europe decreases.