Answer:
Option B is correct.
The actual miles 63.75 does 0.85 inches represents.
Explanation:
Given : The scale of a map is 1 inch : 75 mi
or we can write this as 1 inch = 75 mi, which means that if the distance between two points on map is 1 inch
then it's actual distance is 75 miles
However, the distance between two points is 0.85 inches then its actual distance is :

Therefore, 63.75 actual miles does 0.85 inches represents.