Carter made a model of a boat. The length of the actual boat is 45 feet. Carter’s model has a length of 7 1/2 inches. What scale did Carter use to build his model?

A)1 in. = 4 ft
B)1 in. = 5 ft
C)1 in. = 6 ft
D)1 in. = 7 ft
E)1 in. = 8 ft