What is an appropriate time to replace the I/O drum for the Color LaserJet 2820-2840 series
printer?

A.
when vertical lines appear on printed pages

B.
when dark edges and blotchy skin tones appear in printed images

C.
about 4.000 pages, which is based on 5% coverage

D.
about 10.000 pages, which is based on 5% coverage