Task: Question Answering
Input (English): Question: It takes Avery 3 hours to build a brick wall while Tom can do it in 2.5 hours. If the two start working together and after an hour Avery leaves, how much time will it take Tom to complete the wall on his own?

 Option A: 25 minutes.

 Option B: 30 minutes.

 Option C: 40 minutes.

 Option D: 55 minutes

 Option E: 1 hour and 20 minutes
Output (English): Option C