Use the Following to Answer Question

Multiple Choice

Use the following to answer question:
-(Table: Production of Good Z and Good X in Urbanville) Use Table: Production of Good Z and Good X in Urbanville.This table shows the production possibility frontier for Urbanville.Suppose Urbanville is producing at combination C and moves to combination D.What is the opportunity cost of this move?

A) 15 of X
B) 5 of Z
C) 15 of Z
D) 45 of X