19. Assume that goods X and Y are not Giffen goods. If the price of good X falls, a consumer will
definitely
(A) consume more of good X because her budget constraint has rotated outward.
(B) consume more of good X because her budget constraint has shifted outward.
(C)consume more of good Y because her budget constraint has rotated outward.
(D) consume more of good Y because her budget constraint has shifted outward.
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