The Size and Direction of the Income Effect Depend on All

The size and direction of the income effect depend on all of the following EXCEPT:

A) the amount of the good (X) the consumer buys.
B) the change in the quantity of X when purchasing power is transformed ( $\partial$ X(P_X, P_Y,I) / $\partial$ I) .
C) the change in the consumption of X as the price of X changes, holding utility constant.
D) whether the good is normal or inferior.