Alice and Gene Work in the Mailroom,sorting and Delivering Mail

Multiple Choice

Alice and Gene work in the mailroom,sorting and delivering mail.In order for them to benefit from specialisation and trade,Alice must

A) be able to both sort and deliver faster than Gene.
B) have a comparative advantage in one task and Gene must have a comparative advantage in the other task.
C) be equally productive in both sorting and delivering.
D) have a comparative advantage in both sorting and delivering.
E) be equally productive as Gene in both sorting and delivering.