What is the maximum permitted duration of sound per day in French noise regulations, measured in decibels, for the standard occupational exposure limit?

• A 70 dB(A) for 8 hours
• B 85 dB(A) for 8 hours
• C 80 dB(A) for 8 hours ✓
• D 75 dB(A) for 8 hours

French labour code requires employers to take preventive action when noise reaches 80 dB(A) and mandates hearing protection at 85 dB(A).