Answer:
Option d is the right one.
Explanation:
- Marginal research or analysis to optimize future gains as a decision-making method. In comparison to the expenses incurred by this same behavior, it calculates added benefits. The illustration described demonstrates that the marginal gain is smaller than that of the marginal cost.
- This involves purchasing goods until the marginal gain is equal to the marginal cost.
The other options aren't sufficient for the scenario provided. But that will be the best alternative for option d.