Determine the Unit Rate $0.042 \mathrm{mpg}$ B) $250 \mathrm{mpg}$ C) $24 \mathrm{mpg}$ D) $2400 \mathrm{mpg}$

Determine the unit rate.
-240 miles on 10 gallons of gas

A) $0.042 \mathrm{mpg}$
B) $250 \mathrm{mpg}$
C) $24 \mathrm{mpg}$
D) $2400 \mathrm{mpg}$