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: in town x, 64 percent of the population are employed, and 47 percent of the population are employed males. what percent of the employed people in town x are females ?
Options: a. 16 %, b. 46 %, c. 32 %, d. 24 %, e. 52 %
[EX A]: d

[EX Q]: Problem: a train 510 m long is running at a speed of 45 km / hr. in what time will it pass a bridge 140 m long ?
Options: a. 40, b. 52, c. 26, d. 21, e. 14
[EX A]: b

[EX Q]: Problem: how many prime numbers are between 76 / 8 and 124 / 5 ?
Options: a. 1, b. 2, c. 3, d. 4, e. 5
[EX A]:
e