Answer:
in my opinion it's letter c
Oh gosh gosh oh yeah lol yeah I have to get iio up I think was gonna tell you what the iiii I was going through it and
First map
1 cm------ 10 km
40 cm---- x
x= (40 * 10) /1
x= 400 km, Cincinnati is 400 km away from Cleveland.
Second map
1 cm------ 50 km
x---------- 400 km
x= (400 * 1) /50
x= 8, Cincinnati is 8 cm away from Cleveland.
so he send it to his boss then he got a raise for more money