Exhibit 2-8 -Refer to the Exhibit.Which of the Following Would Cause the Following

Exhibit 2-8

-Refer to the exhibit.Which of the following would cause the production possibilities frontier to shift from AA to BA?  

A)  a drought that affected food production but had no effect on education 
B)  a technological improvement in education that had no effect on food production 
C)  a technological improvement in food production that had no effect on education 
D)  a disease that affected students' ability to learn (and therefore education) but did NOT affect food production