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.

Input: Consider Input: Problem: the total age of a and b is 15 years more than the total age of b and c. c is how many year younger than
Options: a. 14 years, b. 12 years, c. 56 years, d. 66 years, e. 15 years

Output: e


Input: Consider Input: Problem: a couple spent $ 211.20 in total while dining out and paid this amount using a credit card. the $ 211.20 figure included a 20 percent tip which was paid on top of the price which already included a sales tax of 10 percent on top of the price of the food. what was the actual price of the food before tax and tip ?
Options: a. $ 120, b. $ 140, c. $ 150, d. $ 160, e. $ 180

Output: d


Input: Consider Input: Problem: a certain psychologist charges $ 20 more for the first hour of therapy than for each additional hour. if the total charge to a patient who receives 5 hours of therapy is $ 300, what is the total charge to a patient who receives only 3 hours of therapy ?
Options: a. $ 120, b. $ 135, c. $ 150, d. $ 165, e. $ 188


Output: e