In: Economics
Profits are maximized where
| a. | 
 TR = TC.  | 
|
| b. | 
 TR - TC = 0.  | 
|
| c. | 
 the slope of the total revenue curve exceeds the slope of the total cost curve by the largest margin.  | 
|
| d. | 
 total revenues exceed total cost by the largest amount possible.  | 
So as we know
Total Revenue is basically product of Price and Output .
Total Cost = Fixed cost + Variable Cost
So as we know , Profit = Total Revenue - Total Cost . So firms either earn higher profits by maximizing the Total revenue or by minimizing the Total Cost . Because by maximizing Total revenues or by minimizing the total cost , the difference between TR and TC will exceed . Hence higher the difference , higher will be the amount of revenues .
Hence (D) part is a correct answer