Final answer:
The opportunity cost for Jason investing in construction contracts is the potential earnings from the other investments he didn't choose, such as oil contracts or an IPO.
Step-by-step explanation:
The opportunity cost for Jason, if he invests all of the money with the construction contracts, is the foregone profits he could have earned from investing in the oil contracts or the Initial Public Offering (IPO) of a company's stock.
These missed potential earnings represent the opportunity cost because they are the next best alternatives that he has to give up in order to invest in the construction contracts. In economics, the concept of opportunity cost emphasizes that every decision has a trade-off and the cost of a chosen investment is the value of the best alternative that was not selected.