Lucas Has Been Invited to Attend His First Sales Meeting

Lucas has been invited to attend his first sales meeting and wants to follow proper meeting etiquette. Which of the following should he do to make a good impression?

A) Keep his cell phone and pager on so that he doesn't miss an important call.
B) Leave the room only for breaks and emergencies.
C) Use body language to show if he's bored; the chair will appreciate his honesty.
D) Lucas should do all of these.