The economy moves from point A, where it produces 100 units of X and 200 units of Y, to point B, where it produces 200 units of X and 150 units of Y. It follows that
a)point A is a productive inefficient point.
b)point A may be a productive inefficient point.
c)point A may be a productive efficient point.
d)point B is a productive efficient point.
e)b and c