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: 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: find value for x from below equation ? x + 1 = - 3
Options: a. 1, b. - 4, c. - 1, d. 2, e. 3

Output: b


Input: Consider Input: Problem: subtracting 5 % of a from a is equivalent to multiplying a by how much ?
Options: a. 0.95, b. 9.4, c. 0.094, d. 94, e. none


Output: a