Laura is a manager for HP. When Laura must decide whether to produce a few additionalprinters, she is choosing at the margin when she compares

A.

the extra revenue from selling a few additional printers to the average cost of producing the additional printers.

B.

the extra revenue from selling a few additional printers to the extra costs of producing the printers.

C.

the cost of producingHP's printers as compared to printers from competingcompanies, such as Lexmark.

D.

the revenue from sellingHP's printers as compared to printers from competingcompanies, such as Lexmark.

E.

the total revenue from sales of printers to the total cost of producing all the printers.