Answer:
e. the personal value of each additional shirt he purchases starts to fall.
Explanation:
Diminishing marginal utility means that as the number of goods that you consume increases, the utility received from consuming every additional unit decreases. For example, if you are very thirsty and drink a glass of Coke, the first glass will yield a very high utility. But as you consume more and more Coke, the following glasses will yield lower utility.
