Consider the Following Three Concepts

Multiple Choice

Consider the following three concepts:
I. Marshallian Demand [x = x(p_x,,p_y ,I) ]
II. Indirect Utility [V = g (p_x,,p_y ,I) ]
III.Compensated Demand [x = x^c (p_x,,p_y ,U) ]
Which of these functions is necessarily homogeneous of degree zero in all its argument?

A) All of them.
B) None of them.
C) Only I.
D) I and III,but not II.