Which statement best describes the key features of the OfficeJet Pro series?

A.
OfficeJet Pro series printers require minimal maintenance and use half the number of cartridges
as competing devices.

B.
OfficeJet Pro series printers reduce the carbon footprint by over 45%.

C.
OfficeJet Pro series printers deliver outstanding efficiency and reduce energy costs by 30%.

D.
OfficeJet Pro series printers operate at twice the speed and half the cost of color laser printers.

Explanation:
http://www.hp.com/products1/inkjetprinter/officejet.html (see HP Officejet Pro -series,
first sentence)