What characteristics does a well-written application letter usually have?　

A、Itstatesclearlythejoborpositionapersonisapplyingfor.
B、Itshouldtellwhatapersonisqualifiedforandcapableof.
C、Itshouldbebriefbutspecific,politebutenthusiastic,andsimplebutinteresting.
D、Itshouldbecarefullywritten,neatlytyped,andpromptlysent.