A user, who is attempting to give a presentation via a projector in a conference room, reports that the projector has video but no audio. Which of the following...

A user, who is attempting to give a presentation via a projector in a conference room, reports that the projector has video but no audio. Which of the following will.
MOST likely resolve the issue?

A. Changing the input on the projector to VGA B. Changing the output on the PC to DVI C. Modifying the projector's refresh rate D. Utilizing an HDMI connection