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 clock shows the time as 9 a. m. if the minute hand gains 7 minutes every hour, how many minutes will the clock gain by 6 p. m. ?
Options: a. 30 min, b. 35 min, c. 63 min, d. 50 min, e. 55 min
[EX A]: c

[EX Q]: Problem: when jessica withdrew $ 200 from her bank account, her account balance decreased by 2 / 5. if she deposits an amount equal to 2 / 3 of the remaining balance, what will be the final balance in her bank account ?
Options: a. 300, b. 375, c. 400, d. 500, e. 575
[EX A]: d

[EX Q]: Problem: the length of a rectangular plot is thrice its breadth. if the area of the rectangular plot is 867 sq m, then what is the breadth of the rectangular plot ?
Options: ['a. 19 m', 'b. 17 m', 'c. 10 m', 'd. 12 m', 'e. 18 m']
[EX A]:
b