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 can give b 100 meters start and c 200 meters start in a kilometer race. how much start can b give c in a kilometer race ?
Options: a. 111.12 m, b. 221.12 m, c. 271.12 m, d. 611.12 m, e. 191.12 m
[EX A]: a

[EX Q]: Problem: if a sum of money doubles itself in 20 years at simple interest, the ratepercent per annum is
Options: a. 12, b. 12.5, c. 13, d. 5, e. 14
[EX A]: d

[EX Q]: Problem: trapezoid jklm in the x - y plane has coordinates j = ( – 2, – 4 ), k = ( – 2, 1 ), l = ( 6, 7 ), and m = ( 6, – 4 ). what is its perimeter ?
Options: a. 34, b. 36, c. 38, d. 40, e. 42
[EX A]:
a