Which sentence is worded correctly and avoids using a run-on? a. the car had to swerve suddenly when they saw another car going through a red light; there was no accident. b. the car had to swerve suddenly they saw another car going through a red light, there was no accident. c. the car had to swerve suddenly when they saw another car, going through a red light there was no accident. d. the car had to swerve suddenly, when they saw another car going through a red light, there was no accident.