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 cricket player whose bowling average was 23.50 runs per wicket, takes 5 wicket for 52 runs in a match. due to this his average decreases by 0.50. what will be the number of wickets taken by him till the last match ?
Options: a. 64, b. 72, c. 131, d. 456, e. 108
[A]: c


[Q]: Problem: last year elaine spent 20 % of her annual earnings on rent. this year she earned 20 % more than last year and she spent 30 % of her annual earnings on rent. the amount she spent on rent this year is what percent of the amount spent on rent last year ?
Options: a. 185.5, b. 180.0, c. 167.5, d. 172.5, e. 177.5
[A]: b


[Q]: Problem: a searchlight on top of the watch - tower makes 6 revolutions per minute. what is the probability that a man appearing near the tower will stay in the dark for at least 10 seconds ?
Options: a. 1 / 4, b. 1 / 3, c. 1 / 2, d. 2 / 3, e. 1
[A]:
e