MUSIC AND PAINTING ARE ... SUBJECTS. A. OPTIONING B. OPTIONAL...

558. - 1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN
1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN

558. Music and painting are ... subjects.

A. optioning

B. optionally

C. option

D. optional