At least they don’t ask for money

In which of these situations would be the most applicable for degaussing your monitor?

A) The display shows large areas of discoloration

B) The display is slightly blurry or out of focus

C) The displayed image is not refreshing properly, leaving portions of the image incorrectly displayed

D) One of your pixels is stuck into an always-on state

E) Your display has managed to pick up another infestation of fleas