Which of the Following Would Contribute to an Effective Delivery

Which of the following would contribute to an effective delivery of a group presentation?

A) When it is your turn to speak, look at your teammates.
B) When you're not speaking, look at the audience with undivided attention.
C) If you are bored when a team member is speaking, look at your notes to hide your boredom.
D) Choose a seating format that will allow each speaker to get up and sit down without running into obstacles or bumping into one another.