If a person receives a consumer's surplus from the purchase of a good, which of the following must be true? Question 7 options: a) The value is negative because consumers have diminishing marginal utility. b) The amount that the person values the good minus the amount that this person paid for that good is greater than zero. c) The amount that the person paid minus the amount that this person values that good is greater than zero. d) The result is based solely on the supply of the good