Which of the following is/are correct about the Walrasian demand function?
A. X(P, W) is homogeneous of degree zero if X(aP, aW) = X(P, W) for any P, W and a > 0.
B. X(P, W) is homogeneous of degree one if X(aP, aW) = aX(P, W).
C. X(P, W) satisfies Walras' law if for every P >> 0 and W > 0, P.X = W for all X in X(P, W).
D. Walras' law says the consumer fully expends his wealth.
E. If price and wealth both change in the same proportion, individual consumption choice does not change.
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