Task: Question Answering
Input (English): Problem: 8 men can do a piece of work in 12 days. 4 women can do it in 48 days and 10 children can do it in 24 days. in how many days can 10 men, 4 women and 30 children together complete the piece of work ?
Options: a. 5 days, b. 15 days, c. 28 days, d. 4 days, e. 7 days
Output (English): d