Subject: mathqa
Question: jane and ashley take 8 days and 40 days respectively to complete a project when they work on it alone . they thought if they worked on the project together , they would take fewer days to complete it . during the period that they were working together , jane took an eight day leave from work . this led to jane ' s working for four extra days on her own to complete the project . how long did it take to finish the project ?
Option: 
A: 15 days
B: 14 days
C: 20 days
D: 16 days
Answer: B