Final answer:
The law of diminishing marginal utility states that as more units of a good are consumed, the additional utility gained from each unit decreases.
Step-by-step explanation:
The law of diminishing marginal utility states that as more and more units of a good are consumed, utility will decline beyond a point. This means that each additional unit of a good consumed provides less additional utility than the previous unit. For example, the first T-shirt José picks may give him an additional 22 utils of utility, but the fourth T-shirt may only yield 18 additional utils.