Horses live to be twenty years old.
(false, horses live 25-32 statistically.)
Answer C- by illustrating how divided the people already are concerning language. C because it explains why it will be divided
Jimmy studied hard for his test- He will get a good grade.
Justin did great on his homework- Justin will receive a good grade for his homework.
Practiced reading every night- She is a good reader now.
I would say B. gerund phrase. I just learned about this a week ago