Answer: Option A
Explanation: In simple words, intertemporal decision making refers to the study of how the decision made by an individual today affects the choices that he or she have in the future. It is based on the assumption that less consumption today will bring significant increase in consumption tomorrow.
In the given case, despite of having enough income to lead a healthy lifestyle in present,Lee decided to save his money in the future. This will lead to choices fro him that will give him higher utility.
Hence from the above we can conclude that the correct option is A.