Leon created a scale drawing of the school library in his art class. In the scale drawing, the length of the library is 13 inches. The length of the actual library is 78 feet.
Which scale did Leon use to create the scale drawing of the school library?
a 1 inch represents 6 feet
b 1 inch represents 16 foot
c 6 inches represents 1 foot
d 6 inches represents 16 foot