PLEASE HELP ME ASAP

Which is the correct use of
the following participle
phrase:
reading until late every
night
A. Reading until late every night,
staying awake in class the next day was
hard.
B. Reading until late every night, it was
hard to stay awake in class the next
day.
C. Reading until late every night, I was
unable to stay awake in class the next
day.