Which of the following sentences is correctly written?
a. mike wanted to get home, before the ice storm that was forecasted for the immediate area hit.
b. before the race was over pierre got a sudden burst of energy that propelled him to the finish line.
c. as i have said before, painting the inside of the entire office building will take more than one week.
d. eduardo climbed some peaks in the himalayan mountain range, when he was studying to become a guide.

its a hard situation i cant really answer because the essay is for you to write.

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.