After Selling 1000 Three-Ring Binders, Tony DiFulvio Realises That the Marginal

Multiple Choice

After selling 1000 three-ring binders, Tony DiFulvio realises that the marginal revenue from selling the last binder was less than the marginal cost.From this we can conclude that

A) Tony's business earns a short-run economic profit.
B) Tony should shut down his business temporarily.
C) Tony's profit fell after selling his 1000th three-ring binder.
D) Tony's profit would be greater if he sold an additional three-ring binder.