Which of the Following Is True of Speaking Notes for an Extemporaneous

Which of the following is true of speaking notes for an extemporaneous presentation?

A) They should never be typed.
B) The more detailed they are, the better.
C) They must be written on index cards.
D) It is advisable to create and use a set of brief notes (not word-for-word sentences) in large font, to remind you of the order and content of ideas.