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 Q]: Problem: what is the total number of integers between 10 and 50 that are divisible by 2 ?
Options: a. 18, b. 19, c. 22, d. 25, e. 10
[EX A]: b

[EX Q]: Problem: a store reported total sales of $ 460 million for february of this year. if the total sales for the same month last year was $ 320 million, approximately what was the percent increase in sales ?
Options: a. 2 %, b. 17 %, c. 44 %, d. 65 %, e. 83 %
[EX A]: c

[EX Q]: Problem: the simple form of the ratio 7 / 6: 2 / 5 is ?
Options: a. 10: 6, b. 10: 3, c. 15: 3, d. 25: 3, e. 35: 12
[EX A]:
e

