Kumar Gave His Informative Speech on Meteorology

Kumar gave his informative speech on meteorology. As part othe speech, he displayed an excellent drawing to indicate the temperatures in different layers othe atmosphere. When he got to the drawing, he said, "As you can see, each layer has a different temperature." He then covered up the drawing and quickly moved on. What should Kumar have done to present his visual aid more effectively?

A) He should have created a handout and passed it among the audience.
B) He should have explained the visual aid more fully.
C) He should have displayed a photograph instead of a drawing.
D) all of the above
E) a and b only