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There were m men in a bus. The number of children in the bus was three times that of men but eleven more than that of women. The total number of women, men and children in the bus was 45. Which one of the equations below can be used to find the number of men that were in the bus?
A. 5m-11=45
B. 4m+11=45
C. 7m+11=45
D. 7m -11=45