Final Answer:
The brake is applied and out of adjustment - The angle between the slack adjuster and pushrod indicates a need for brake adjustment. Option A is the answer.
Step-by-step explanation:
The angle between the slack adjuster and pushrod serves as an indicator of the brake system's status. When the brake is applied and out of adjustment, there is an observable angle between the slack adjuster and pushrod.
This suggests that the brake is not functioning optimally, requiring adjustment. Proper brake adjustment is crucial for efficient and safe vehicle operation. If the brake is applied and adjusted correctly, there should be minimal or no visible angle between the slack adjuster and pushrod.
The correct answer, option A, highlights the significance of monitoring this angle to ensure proper brake functionality.