Use the Following to Answer Question

Multiple Choice

Use the following to answer question:
Figure 4.12
-(Figure 4.12) The three-legged Ork, a space creature from the universe Warhammer, wears 1 right shoe and 2 left shoes. His indifference curves are presented in Figure 4.12. Based on the shape of the Ork's indifference curves, right and left shoes are:

A) perfect substitutes.
B) perfect complements.
C) consumed in changing proportions.
D) neither perfect substitutes nor perfect complements.