What is the correct way to test hydraulic brakes for leaks?

Answer: A — Pump the brake pedal and hold

To test hydraulic brakes for leaks, pumping the brake pedal and holding it is the correct approach. This method allows the driver to determine whether the pedal maintains its position. If the pedal gradually sinks to the floor, this indicates a possible leak in the hydraulic system, as it would suggest that the system is losing pressure. Maintaining pressure is crucial in a hydraulic brake system, as it ensures effective stopping power and overall safety while driving. Other choices focus on different aspects of brake maintenance. Checking brake fluid levels provides valuable information about the condition of the fluid and may indicate a leak if levels are low, but it won't directly show a leak during a brake test. Inspecting brake lights is essential for ensuring that other drivers are aware when you are stopping but does not relate to brake function or leaks. Examining brake pads is important for understanding the wear and overall condition of the braking system but does not directly address hydraulic leaks. Hence, testing the pressure by pumping and holding the pedal is the most effective method for assessing leaks in hydraulic brakes.