{$mEDiAurl} whAt DoEs thE proFEssor mEAn whEn shE sAys this:A.thE photogrAphEr’s viEwpoint is suBjECtivE. B.photogrAphs shoulD rEprEsEnt An oBjECtivE point oF viEw. C.it’s impossiBlE For A photogrAphEr to BE unBiAsE D、 D、thE imAgEs oFtEn rEFlECt thE photogrAphEr’s prEjuDiC