Task: Question Answering
Input (English): Question: Johny went up a certain hill at the rate of one and a half kilometers per hour and came down at the rate of four and a half kilometers per hour, so that it took just four hours to make the double journey. How far was it to the top of the hill ?

 Option A: 3 km

 Option B: 6 km

 Option C: 4.5 km

 Option D: km

 Option E: none of the above
Output (English): Option C