Gerka finally left the library at midnight, and went home to get a few hours of sleep; he promised himself that he would return early
the next morning to finish his research.
What is the correct way to write this sentence?
A Gerka finally left the library at midnight and went home to get a few hours of sleep: he promised himself that
he would return early the next morning to finish his research.
B. Gerka finally left the library at midnight, and went home to get a few hours of sleep; he promised himself that
he would return, early the next morning to finish his research.
C. Gerka finally left the library at midnight, and went home to get a few hours of sleep; he promised himself, that
he would return early the next morning to finish his research.
D. Gerka finally left the library at midnight and went home to get a few hours of sleep; he promised himself that
he would return early the next morning to finish his research