John believes using computers to give presentations has great potential for technical problems, and is ineffective, since it takes attention away from the speaker. Instead, he requests a blackboard and chalk to support his speech

What potential problem does this low technology option share with computer-assisted presentations?
A. The blackboard and chalk might break down.
B. John might end up turning away from his audience too much by facing his audio-visuals.
C. John is wrong. In public speaking more technology is always better.
D. Both would require the room to be darkened.

B