This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to paint a mailbox
Remove the mailbox from the wall or post, if you can.
It should be screwed on. Be sure to save the screws some place safe so that you can reattach the mailbox later.

Select from: A). Place the mailbox on top of a drop cloth. Make sure that there is some space between the mailbox and the post of whatever type of fence/gutter you chose.; B). Decide if you want to wall paint the mailbox. Most torsion mailers need to be done on the back.; C). If you cannot remove the mailbox, you will need to cover the post or the surrounding wall with some masking paper and painters tape. Remove all parts from the mailbox, if possible.; D). Change the seal of the mailbox. You could change any seal in the mail.;
The answer is:
C).