The correct option is B 56 inches
Length of the corridor = 4 feet and 8 inches
We know that 1 foot = 12 inches.
Then, 4 feet = 1 foot + 1 foot + 1 foot + 1 foot
4 feet = 12 inches + 12 inches + 12 inches + 12 inches = 48 inches
4 feet and 8 inches = 48 inches + 8 inches = 56 inches
Therefore, the length of the corridor is 56 inches.