Which action can improve control during a sudden stop?

Applying brakes smoothly and evenly is the best action to improve control during a sudden stop. This technique helps maintain stability and balance by distributing braking force evenly between the front and rear wheels, reducing the risk of skidding or losing control. When brakes are applied abruptly or unevenly, it can lead to a loss of traction, especially on two-wheeled vehicles, where balance is crucial. Smooth braking allows the rider to manage weight transfer effectively and helps keep the motorcycle upright, which is essential for safely stopping in an emergency situation.

Other options might suggest methods that could lead to loss of control or instability. For instance, pulling the throttle at the last moment can increase speed and is counterproductive during a stop. Shifting body weight back can affect the bike's balance negatively if not done correctly. Relying solely on the rear brake could lead to tipping over or skidding, as the front brake typically provides more stopping power and helps keep the motorcycle stable.