A bus for Delhi leaves every 30 minutes from a bus stand. An inquiry clerk told a passenger that the bus had already left 10 min ago and next bus will leave at 9 : 35 am. At what time did the inquiry clerk give this information to the passenger?

• A. 9 : 10 am
• B. 8 : 55 am
• C. 9 : 08 am
• D. 9 : 15 am