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.

[Q]: 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
[A]: d


[Q]: Problem: a couple who own an appliance store discover that if they advertise a sales discount of 10 % on every item in the store, at the end of one month the number of total items sold increases 15 %. their gross income from sales for one month increases by what percent ?
Options: a. 1.5 %, b. 2.5 %, c. 3.5 %, d. 4.5 %, e. 5.5 %
[A]: c


[Q]: Problem: carrey rented a car for rs. 20 plus rs. 0.25 per kilometer driven. samuel rented a car for rs. 24 plus rs. 0.16 per kilometer driven. if each drove d km. and each was charged exactly the same amount for the rental, then d equals ?
Options: a. 44.4, b. 44.8, c. 1, d. 19, e. 44.11
[A]:
a