Nick's Indifference Curves Are Circles, All of Which Are Centered

Multiple Choice

Nick's indifference curves are circles, all of which are centered at (12, 12) .Of any two indifference circles, he would rather be on the inner one than the outer one.

A) Nick's preferences are not complete.
B) Nick prefers (16, 17) to (10, 10) .
C) Nick prefers (10, 17) to (10, 10) .
D) Nick prefers (8, 8) to (17, 21) .
E) More than one of the above statements are true.