Consider the Following Set of Indifference Curves

Consider the following set of indifference curves:
Investment Y is:

A) preferred to Investments X and Z and is as desirable as Investment W.
B) preferred to Investment W,but is inferior to Investments X and Z.
C) preferred to Investments X and Z,but is inferior to Investment W.
D) preferred to Investments X and Z,which provide an investor with equal utility,and is preferred to Investment W.