Iwant to go to 9th grade plz

earthworms have tiny bristles called setae which usually stay inside of their bodies. they can, however, jab them into the surrounding dirt to them move forward. what is another way that earthworms often use their setae?
a. to anchor themselves to the ground when a bird tries to pull them away
b. to push dirt in their mouths when eating
c. to oxygen diffuse through their skin better
d. to glide along the surfaces of water bodies