In Louise's speech about various golf grips and strokes, she used several golf clubs and demonstrated the moves herself

In Louise's speech about various golf grips and strokes, she used several golf clubs and demonstrated the moves herself. Was this a good technique for use of presentation aids?

Select one:

a. Yes, a speaker can serve as a presentation aid to demonstrate how something works or is done.

b. Yes, but only if other objects or charts are used in conjunction with the speaker's movements.

c. No, Louise should have used someone else to demonstrate, so that she could keep speaking.

d. No, demonstrations like this are distracting and too informal for a public speech.