You are driving to your workplace and on the way you suddenly witness an accident in which two persons…

The correct choice is: stop and help the injured

Human life comes before being on time for work. The responsible action is to stop, help the injured get medical care and, if needed, call the police/ambulance.

Driving away, or only phoning and moving on, abandons people in urgent need; merely urging others to help is not enough when you are there.

Hence the answer is ‘stop and help the injured’.