Task: Question Answering
Input (English): Problem: a garrison of 2000 men has provisions for 54 days. at the end of 18 days, a reinforcement arrives, and it is now found that the provisions will last only for 20 days more. what is the reinforcement ?
Options: a. 1977, b. 1600, c. 1979, d. 1900, e. 1278
Output (English): b