Suppose Andrea is taking just two courses and is at a point on her PPF of grades for those two courses. Now this PPF shifts inward and Andrea moves to a point on the new PPF. Then it is impossible for

Suppose Andrea is taking just two courses and is at a point on her PPF of grades for those two courses.  Now this PPF shifts inward and Andrea moves to a point on the new PPF.  Then it is impossible for

a. both of her grades to fall.
b. both of her grades to rise.
c. one of her grades to rise and the other grade to fall.
d. one of her grades to fall while the other grade stays constant.


ANS: B


Production Possibilities Frontier Framework

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