4) refer to the figure below, which shows a country’s possible production possibility fron
4) Refer to the figure below, which shows a country’s possible production possibility frontiers and indifference curves. If the country is producing at ________, then moving to ________ will cause utility to ________.
A、point c; point b; remain unchanged
B、point a; point b; increase
C、point c; point b; increase
D、point c; point b; decrease