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.

Ex Input:
Problem: a bag of potatoes weighs 60 lbs divided by half of its weight. how much does the bag of potatoes weight ?
Options: a. 20 lb, b. 11 lb, c. 10 lb, d. 15 lb, e. 5 lb

Ex Output:
b


Ex Input:
Problem: in a certain deck of cards, each card has a positive integer written on it, in a multiplication game a child draws a card and multiplies the integer on the card with the next large integer. if the each possible product is between 35 and 200, then the least and greatest integer on the card would be
Options: a. 3 and 15, b. 3 and 20, c. 4 and 13, d. 4 and 14, e. 5 and 14

Ex Output:
e


Ex Input:
Problem: a cistern which could be filled in 8 hours takes one hour more to be filled owing to a leak in its bottom. if the cistern is full in what time will the leak empty it ?
Options: a. 76 hrs, b. 99 hrs, c. 55 hrs, d. 90 hrs, e. 40 hrs

Ex Output:

e