Task: Question Answering
Input (English): Question: A school has received 50% of the amount it needs for a new building by receiving a donation of $400 each from people already solicited. People already solicited represent 40% of the people from whom the school will solicit donations. How much average contribution is requited from the remaining targeted people to complete the fund raising exercise?

 Option A: $400

 Option B: $177.78

 Option C: $320

 Option D: $277

 Option E: $200
Output (English): Option C