Question

All of the following are examples of warm-up exercises for your body and voice except:
a.
Drink lots of water. Avoid too much caffeine, alcohol, or other dehydrating liquids the day of your presentation.
b.
Pretend like you're chewing a giant wad of bubble gum --- stretch your jaw, lips, tongue. Add a vocal sound --- any old sound --- don't make it pretty.
c.
Raise your arms up overhead while you inhale through your nose, keeping your belly free.
d.
All of the above are examples of warm-up exercises for your body and voice.

Answer 1

d. All of the above are examples — each item (hydration, jaw/tongue/lip stretches with vocalizing, and arm-rise breathing) is a valid body/voice warm-up.