The law of diminishing marginal utility explains why
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Correct Answer: Option A
Explanation:
 In economics, the law of diminishing marginal utility states that the marginal utility of a good or service declines as its supply increases.
The law of diminishing marginal utility helps to explain the negative slope of the demand curve and the law of demand. If the satisfaction obtained from a good declines, then buyers are willing to pay a lower price, hence demand price is inversely related to quantity demanded, which is the law of demand.
 In economics, the law of diminishing marginal utility states that the marginal utility of a good or service declines as its supply increases.
The law of diminishing marginal utility helps to explain the negative slope of the demand curve and the law of demand. If the satisfaction obtained from a good declines, then buyers are willing to pay a lower price, hence demand price is inversely related to quantity demanded, which is the law of demand.