Task: Question Answering
Input (English): Problem: in a 100 m race, sam beats john by 5 seconds. on the contrary, if sam allowed john to start 15 m ahead of sam, then sam and john reach the finishing point at the same time. how long does sam take to run the 100 m race ?
Options: a. 4 seconds, b. 25 seconds, c. 29 seconds, d. 21 seconds, e. 17 seconds
Output (English): e