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 sum of money will produce rs. 80 as simple interest in 4 years at 3 1 / 2 percent ?
Options: a. 263, b. 571.4, c. 367, d. 368, e. 339
[EX A]: b

[EX Q]: Problem: aaron will jog from home at 2 miles per hour and then walk back home by the same route at 4 miles per hour. how many miles from home can aaron jog so that he spends a total of 3 hours jogging and walking ?
Options: a. 5, b. 7, c. 3, d. 9, e. 10
[EX A]: c

[EX Q]: Problem: the length of minute hand of a clock is 5.4 cm. what is the area covered by this in 20 minutes
Options: a. 15.27, b. 16.27, c. 17.27, d. 30.54, e. 30.27
[EX A]:
d