Visual aids, if selected and designed appropriately, can help the speaker enhance the presentation. Which of the following is the proper way to use the visuals?

A、Exposethedrawingsandchartsatthebeginningofthepresentation.;
B、Containasmuchinformationasyoucaninoneslide.;
C、Waveapointeraroundandmakeitaplaything.;
D、Correlatethevisualwiththeverbalexpression.