Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

Example Input: Problem: p has $ 32 more than what q and r together would have had if both b and c had 1 / 6 of what p has. how much does p have ?
Options: a. $ 44, b. $ 48, c. $ 52, d. $ 56, e. $ 60
Example Output: b

Example Input: Problem: a hiker walked for 3 days. she walked 18 miles on the first day, walking 3 miles per hour. on the second day she walked for one less hour but she walked one mile per hour, faster than on the first day. on the third day 5 miles per hour for 6 hours. how many miles in total did she walk ?
Options: a. 68, b. 44, c. 58, d. 60, e. 62
Example Output: a

Example Input: Problem: the cross - section of a cannel is a trapezium in shape. if the cannel is 8 m wide at the top and 6 m wide at the bottom and the area of cross - section is 700 sq m, the depth of cannel is ?
Options: a. 76, b. 100, c. 27, d. 80, e. 25
Example Output:
b