Which choice displays both correct comma usage and proper parallel structure? A) A good stage performer must be able to sing, to dance, and enunciation. Reactivate B) A good stage performer must be able, to sing, to dance, and enunciation. Reactivate C) A good stage performer must be able to sing, to dance, and to enunciate clearly. D) A good stage performer, must be able to sing, to dance and to enunciate clearly.