Weverton Cliffs is a hiking trail in Maryland. This trail is 3 inches long on a map that has a scale of 7 ½ inches = 15 miles.

If Sarah hikes Weverton Cliffs from beginning to end and returns along the same trail, what is the total distance she hikes?

A. 3 miles
B. 6 miles
C. 12 miles
D. 18 miles