Answer:
A) allows us to make interpersonal utility comparisons.
Step-by-step explanation:
The law of diminishing marginal utility states that as each additional unit of product or service is consumed, the benefit or utility obtained from its consumption diminishes (is reduced).
For example, you are very thirsty and drink a cold Coke. The first glass was great, but if you continue drinking more, the satisfaction you get from drinking Coke reduces until finally you do not even want to drink any more.
The law of diminishing marginal utility is not applicable to money.