Task: Question Answering
Input (English): Question: The pilot of a small aircraft with a 40-gallon fuel tank wants to fly to Cleveland, which is 480 miles away. The pilot recognizes that the current engine, which can fly only 7 miles per gallon, will not get him there. By how many miles per gallon must the aircraft’s fuel efficiency be improved to make the flight to Cleveland possible?

 Option A: 2

 Option B: 4

 Option C: 5

 Option D: 40

 Option E: 160
Output (English): Option C