Final answer:
The audible and visual alarm indicators are used to meet the requirements specified in option C) testing to determine indicator function should be scheduled periodically and records maintained between testing.
Step-by-step explanation:
The audible and visual alarm indicators are used to meet the requirements specified in option C) testing to determine indicator function should be scheduled periodically and records maintained between testing. These indicators are used to ensure that the alarm system is functioning correctly and can be tested regularly to ensure their proper function. Records should also be maintained to track the testing and ensure that any malfunctions are reported.