AMC8 1986 Problem 1

In July 1861,366 inches of rain fell in Cherrapunji, India. What was the average rainfall in inches per hour during that month?

Answer Choices
A. \dfrac{366}{31 \times 24}
B. \dfrac{366 \times 31}{24}
C. \dfrac{366 \times 24}{31}
D. \dfrac{31 \times 24}{366}
E. 366 \times 31 \times 24