Card 6 / 15: If a consumer’s marginal rate of substitution equals 2 eggs for 1 mango, Which of the following statements must be necessarily true ?
A) the consumer’s indifference curve must be positively sloped
B) the consumer’s indifference curve must be convex with respect to the origin
C) the ratio of the consumer’s marginal utility of 1 egg to that of 1 mango must equal ½.
D) all of the above are true

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