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: if the perimeter of a rectangular garden is 700 m, its length when its breadth is 100 m is ?
Options: a. 299 m, b. 777 m, c. 200 m, d. 250 m, e. 128 m

Answer: d

Question: Problem: if 50 apprentices can finish a job in 4 hours, and 30 journeymen can finish the same job in 8 hours, how much of the job should be completed by 10 apprentices and 15 journeymen in one hour ?
Options: a. 1 / 9, b. 29 / 180, c. 9 / 80, d. 1 / 5, e. 39 / 121

Answer: c

Question: Problem: $ 4,000 is deposited in a savings account that pays 8 % annual interest compounded semiannually. to the nearest dollar, how much is in the account at the end of the year ?
Options: a. $ 4326.40, b. $ 4116.20, c. $ 4256.21, d. $ 4316.54, e. $ 4312.45

Answer:
a