Final answer:
The question pertains to an inspection of the brake assembly. The correct answer requires checking the brake shoes for wear, ensuring the return spring is installed correctly, and verifying proper installation of the rollers. Exact diagnosis would depend on the visual inspection of these components.
Step-by-step explanation:
The subject of the student's question is related to the inspection of a brake assembly in a vehicle.
It is a high school level engineering or automotive repair question.
To accurately determine the condition of the brake assembly, each part mentioned in the options must be assessed against standard criteria.
For example:
Brake shoes: Check for minimum thickness & even wear.
Return spring: Verify proper tension and positioning.
Rollers: Ensure correct installation and smooth operation.
Without an actual image to inspect, the answer would depend on the condition observed during the inspection.
However, if you encounter worn brake shoes (option a), it's essential for safety to replace them.
If the return spring is damaged or incorrectly installed (option c), this needs correction to allow the brake shoes to retract properly after braking.
Finally, if the rollers are not installed properly (option d), they can lead to uneven wear or improper functioning of the brake assembly.
Remember to always refer to the vehicle manufacturer's service manual for specific inspection and repair guidelines.