The figure below shows Becky’s daily production possibilities curve for dresses and skirts.Of the labeled points, only __ are efficient.

The figure below shows Becky’s daily production possibilities curve for dresses and skirts.Of the labeled points, only __ are efficient.
A.W, X, Y, Z, and V
B.X, Y, and Z
C.W, X, Y, Z, V, and T
D.T and U
正确答案：W, X, Y, Z, and V