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: a / ( b / c. in the expression above, a, b, and c are different numbers and each is one of the numbers 2, 3, or 6. what is the largest possible value of the expression ?
Options: a. 2 / 18, b. 6 / 3, c. 30 / 2, d. 18 / 2, e. 6 / 18
[EX A]: d

[EX Q]: Problem: each of the three people individually can complete a certain job in 3, 4, and 6 hours, respectively. what is the lowest fraction of the job that can be done in 1 hour by 2 of the people working together at their respective rates ?
Options: a. 1 / 3, b. 9 / 20, c. 8 / 15, d. 5 / 12, e. 2 / 3
[EX A]: d

[EX Q]: Problem: last year sandy saved 10 % of her annual salary. this year, she made 10 % more money than last year, and she saved 6 % of her salary. the amount saved this year was what percent of the amount she saved last year ?
Options: a. 66 %, b. 80 %, c. 112 %, d. 136 %, e. 148 %
[EX A]:
a