Task: Question Answering
Input (English): Question: A and B can together finish a work in 40days. They worked together for 10days and then B left. After another 12days, A finished the remaining work. In how many days A alone can finish the job?

 Option A: 10

 Option B: 25

 Option C: 60

 Option D: 16

 Option E: 20
Output (English): Option D