The minimum rest in a 24-hour period is 10 hours.

• A. 10 hours
• B. 8 hours
• C. 12 hours
• D. 6 hours

Answer: (A)

Rest is required to prevent fatigue and keep watchstanders alert. In every 24-hour period, at least 10 hours of rest must be taken, so the minimum amount is 10 hours. You could have more than 10 hours if schedules allow, but less than 10 is not permitted. The other options don’t meet the rule (8 and 6 hours are too short), while 12 hours is valid but simply exceeds the minimum.