Eileen Has a Comparative Advantage Over Jan in Piano Tuning,but

Multiple Choice

Eileen has a comparative advantage over Jan in piano tuning,but not shoe polishing.Therefore,_____.

A) Jan must have an absolute advantage in piano tuning
B) Eileen must have an absolute advantage in shoe polishing
C) Jan must have a lower opportunity cost of shoe polishing
D) Eileen must have an absolute advantage in shoe polishing and in piano tuning
E) Eileen must have an absolute advantage in piano tuning