ACCorDing to thE First pArAgrAph tourism is uniquE in its ______.
A．BEing An oBjECtivE sECtor oF EConomy
B．FunCtioning likE Auto mAking or BAnking
C．BEing ABlE to ChAngE A nAtion AnD CulturE
D．luring AttrACtivEnEss to visitors