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.

d.

All of the above are examples of warm-up exercises for your body and voice.

Explanation:

Drinking a great deal of water will contribute to keep you from being dehydrated so you don't strain any of your muscles muscles. Caffeine and liquor will do the inverse of that and that's why you should avoid them.

If you mouth keeps moving, you'll keep it in a state where it feels more loose, making it easier to enunciate words in a more precise way. Also, making noises with your voice warm up the vocal chords.

Stretching to breathe might raise awareness of proper breathing and raising your arms might help you engage your diaphragm.

depends on your school

when i was in high school i took ap biology my senior year and it was the hardest one for me because my teacher finished the material within the first month of school and then went on to doing advanced college level it was horrible. but at a nearby school ap biology was one of the easier aps. also, it depends on what you are interested i like math a lot so ap calculus was easier for me than most but i hate history so ap us government was harder for me than most.