What should the realistic goal of teaching pronunciation be ?（ ）

A、Fluency:thepronunciationshouldbefluent.
B、Consistency:thepronunciationshouldbesmoothandnatural.
C、Intelligibility:thepronunciationshouldbeunderstandabletothelisteners.
D、Communicativeefficiency:thepronunciationshouldhelpconveythemeaningthatisintendedbythespeaker.