What is the basic difference between hydraulic brakes and ABS in emergency vehicle braking, and which signs indicate braking issues?

• A. Hydraulic brakes transfer pedal force to hydraulic pressure, while ABS modulates brake pressure to prevent wheel lock; signs include longer stopping distances, spongy pedal, unusual vibration, warning lights, or brake-fluid leaks.
• B. Hydraulic brakes rely on vacuum assist, while ABS uses electric motors; signs include immediate wheel lock and no warning lights.
• C. ABS brakes are the same as hydraulic brakes but with a reinforced pedal feel; signs include pedal feel becoming harder with time.
• D. Hydraulic brakes are always more effective than ABS in all conditions; signs include no warning lights and perfectly even wear.

Answer: (A)