The following sentence contains a comma splice: I work until nine o'clock on weeknights, my shift ends at midnight on Saturday. Which revision corrects the sentence? I work until nine o'clock, on weeknights. My shift ends at midnight, on Saturday. I work until nine o'clock on weeknights; but my shift ends at midnight on Saturday. I work until nine o'clock on weeknights. My shift ends at midnight on Saturday. I work until nine o'clock on weeknights, because my shift ends at midnight on Saturday.