A bus for Mumbai leaves every 40 minutes from a bus stand. An enquiry clerk told a person that the bus had already left 10 minutes ago and the next bus will leave at 10 :45 a.m. At what time was this information given to the man?
(A) 10 : 05 a.m.
(B) 9 : 55 a.m.
(C) 10 : 35 a.m.
(D) 10 :15 a.m.