I believe the answer is modem
The correction is C.
One of the major factors that determine the quality of a printer is the resolution of that printer. The resolution is also called DPI [Dots Per Inch]. The DPI refers to amount of ink that an inkjet printer can place in a one inch line of a printed document. The higher the DPI of a printer, the higher the resolution.
I believe the answer would be the JPEG file extension.
I know filters, so I know it is Saturation.