What should you do if you feel a loss of braking power while driving?

When experiencing a loss of braking power while driving, using the emergency brake is the appropriate action to help bring the vehicle to a stop safely. The emergency brake is designed to function independently of the hydraulic braking system and can provide additional stopping power in a situation where the primary brakes fail. It is crucial to apply the emergency brake gradually to avoid skidding or losing control of the vehicle.

Additionally, safely bringing the vehicle to a stop should be prioritized to avoid potential collisions and maintain safety for yourself and others on the road. The other options involve actions that could lead to increased danger, such as abrupt lane changes or acceleration, which may compromise your control over the vehicle and result in an accident.