You are about to go onstage to give a presentation. Though you have prepared well, your hands have started to shake and your knees are feeling weak. What do you do?
选项：

A:Call off the presentation. ;
B:Take a deep breath, visualize your success and hold onto the lectern when you are onstage.;
C: Go get a glass of water or something small to hold onto.;
D: Quickly find someone else to give your presentation.