To reduce your reaction time, you should:

Covering the clutch and brakes is an effective strategy to reduce reaction time because it keeps you in a ready state to respond quickly to any sudden changes in traffic or road conditions. By covering the clutch, you ensure that you can disengage the engine from the rear wheel instantly, allowing for smoother deceleration without the risk of stalling. Having your fingers positioned near the brake lever enables you to apply brakes swiftly when needed, enhancing your ability to slow down or stop in emergencies.

This technique is particularly important in dynamic environments where split-second decisions can make all the difference in safety. Being prepared to react without the need for extensive reaching or repositioning your hands can significantly improve your control over the motorcycle and potentially avert accidents.

While the other options may have their merits in specific contexts, they do not prioritize readiness in the same way covering the clutch and brakes do.