How can you test your brakes if they are working properly after driving through a flooded road?

• By stopping quickly and firmly at 50 Km/hr
  Explanation:

  "After driving through a flooded road, your brakes may be wet and less effective. To test them, gently apply the brakes at a low speed, such as 50 km/h, and check for proper response."
• By driving over 80 km/hr
• By threshold braking
• None of these