You are riding in traffic and a car in an adjacent lane begins to merge into your space, seemingly unaware of your presence. What should be your primary response?

1. Honk your horn and accelerate past the vehicle quickly.
2. Brake hard and swerve away from the vehicle.
3. Adjust your speed and position, preparing an escape path, while using your horn.
4. Maintain your speed and lane position, assuming the driver will see you.