which measurement can be used to determine if earplugs are needed when working in a factory?\na watts\nb…

which measurement can be used to determine if earplugs are needed when working in a factory?\na watts\nb amps\nc decibels\nd delta waves
Answer
Brief Explanations:
Decibels measure sound intensity. High - decibel levels in a factory can be harmful to hearing, indicating a need for earplugs. Watts measure power, amps measure electric current, and delta waves are related to brain activity.
Answer:
C. decibels