What should you do when approaching a stopped vehicle with a driver who might move suddenly?

When approaching a stopped vehicle with a driver who might move suddenly, it's crucial to be prepared to stop and maintain a safe distance. This approach allows you to react appropriately if the driver unexpectedly decides to pull out or change positions. Maintaining a safe distance provides you with the necessary reaction time to avoid a potential collision. It also enhances your visibility and space to maneuver if required.

The other choices suggest actions that could lead to increased risk. Accelerating quickly past a stopped vehicle can be dangerous, as it does not allow you the opportunity to react if the driver starts to move. Ignoring the vehicle and maintaining your speed disregards the potential for sudden movement, which could result in an accident. Merging into another lane without signaling not only increases the chance of collision but also violates safe driving practices by failing to communicate your intentions to other road users.