Answer:
The correct answer is letter "E": the marginal benefit of staying open all day and the marginal cost to remaining open all day are at least equal.
Step-by-step explanation:
When the marginal benefit and the marginal cost of the production of a good or rendering a service are equal, from the economic point of view we could say that it is worth it to keep the business operating. If the marginal cost is higher than the marginal benefit, the company is likely to shut down.