19. [G] Assuming Good A and Good B satisfy the Law of Demand, how many of the following scenarios indicate that Good A is a normal good? The derivative of Good A's demand function with respect to income is positive When the price of Good B increases, Good A's income effect is negative. When the price of Good B changes, Good A's income and substitution effect are in the same direction. A B. W N - C. D. None of the above statements are true