Final answer:
A driver who often brakes and struggles to stay in their lane likely isn't looking far enough ahead. This forward focus is crucial for anticipating road conditions and traffic, which in turn aids in lane discipline and consistent speed maintenance.
Step-by-step explanation:
A driver who frequently brakes and has trouble staying in their lane is usually not looking far enough ahead. The correct answer to the question would be choices 1) enough and 2) ahead. It's important for drivers to look ahead while driving to anticipate road conditions and traffic, which allows for timely reactions and helps in maintaining lane discipline. Looking ahead also helps a driver maintain a constant speed, rather than frequent braking which could indicate the driver's attention is too focused on the immediate vicinity of their vehicle. Therefore, a driver looking far enough ahead is less likely to exhibit erratic behaviors such as unnecessary braking and swerving between lanes.