What action should a driver take when approaching a yellow traffic light?

Answer: B — Stop if it's safe to do so

When approaching a yellow traffic light, the driver’s action should be to stop if it is safe to do so. A yellow light indicates that the signal is about to change to red, which means that vehicles must be prepared to stop unless it's unsafe to do so. If a driver is able to stop safely before reaching the intersection, that is the appropriate response to avoid running a red light, which is against traffic laws and poses a safety risk. In situations where stopping may not be feasible — for example, if the vehicle is too close to the intersection or stopping would lead to a dangerous situation — drivers are expected to proceed with caution but should always aim to reduce speed and prepare for the potential of the light turning red. The goal is to maintain safety on the road while adhering to traffic signals.