Shannon drove 400 miles. Which expression shows the miles per gallon obtained by her car if she used g gallons of gas on the trip?%0D%0A A. %0D%0A400 × g%0D%0A B. %0D%0A400 - g%0D%0A C. %0D%0A400 ÷ g%0D%0A D. %0D%0A400 + g