What is the primary function of the HP Color LaserJet Enterprise CP4020/CP4520 Series Printer and
CM4540 MFP Protective Glass Cleaners (PGCs)?

A.
to seal the development area to prevent toner from falling on the laser/scanner protective glass

B.
to collect residual toner that falls from the ITB cleaning blade

C.
to wipe the laser/scanner protective glass when excess toner falls on the glass

D.
to cover the laser/scanner protective glass during print operations to prevent print-quality defects