Which situation describes a car that can travel $40$ miles per gallon of gasoline?
A A car can travel $2$ miles on $80$ gallons of gasoline.
B A car can travel $42$ miles on $2$ gallons of gasoline.
C A car can travel $80$ miles on $2$ gallons of gasoline.
D A car can travel $80$ miles on $40$ gallons of gasoline.