To stay alert, how many hours of sleep are recommended?

• A. 6
• B. 7
• C. 8
• D. 9

Answer: (C)

Staying alert depends on getting enough sleep each night. For adults, about 7 to 9 hours is usually recommended because this range supports steady attention, memory, and mood. Eight hours is a common target because it provides enough time for several sleep cycles and the body’s restoration, helping you feel more awake and focused during the day. Six hours is often not enough and can leave you feeling tired or unfocused. Seven hours still falls in the range and works for many people, but eight hours tends to offer a bit more reserve to stay sharp. Nine hours can be suitable for some individuals, especially if they need more sleep, but eight hours generally balances wakefulness and daily demands for most people.