单项选择题WhichofthefollowingisNOTacommonorcorrectuseofacustomcontrol?()
A.Adding a company logo to business documents
B.As the UI widgets for 1 specificXPage that will never be replicated by any other XPages, ever
C.Adding mailing label information to mail and memo pages
D.As a control that needs to appear conditionally, depending on the result of a formula