Attendant-operated brakes are indicated when the user:

• A. Can operate brakes safely and independently.
• B. Requires assistance only on ramps.
• C. Has automatic braking system.
• D. Does not possess ability to safely or independently operate brakes.

Answer: (D)

The main idea here is safety and the user’s ability to control braking. Attendant-operated brakes are used when the person cannot safely stop or hold the device by themselves. If the user can operate the brakes safely and independently, there’s no need for an attendant to apply them. Needing help only on ramps suggests limited independence but doesn’t prove an overall inability to brake. An automatic braking system would handle braking without requiring an attendant to intervene. So the situation that necessitates attendant-operated brakes is when the user does not possess the ability to safely or independently operate brakes.