instruction:
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.
question:
Problem: 1391 x 1391 = ?
Options: a. a. 1951609, b. b. 1951601, c. c. 1951602, d. d. 1951603, e. e. 1934881
answer:
e

question:
Problem: lucy bought a 1 - year, 10000 certificate of deposit that paid interest at an annual rate of 8 percent compunded semiannually. what was the total amount of interest paid on this certificate at maturity ?
Options: a. 10464, b. 864, c. 816, d. 800, e. 480
answer:
d

question:
Problem: the radius of the two circular fields is in the ratio 4: 10 the area of the second field is what percent greater than the area of the first ?
Options: ['a. 72 %', 'b. 96 %', 'c. 94 %', 'd. 84 %', 'e. 82 %']
answer:
d