Abeer sells a line of copy machines that feature a "quick change" toner cartridge. The empty toner cartridge can be replaced quickly, without any mess, in a matter of seconds. Which of the following statements represents the most effective presentation of this feature?

$$ a$.$

$"$If you purchase one of our copy machines, you will enjoy the benefits of a quick change toner cartridge."

O b$.$

$"$We have set a new industry standard with the quick change toner cartridge."

$$ c$.$

"All of our copy machines are equipped with a quick change toner cartridge, which means you no longer waste time replacing an empty toner cartridge."

O d$.$

$"$We have recently developed the only office copy machine that features a quick change toner cartridge."

O e$.$

"After vears of research and development, our engineers have developed a quick change toner cartridge."