You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Ex Input:
Question: P can do a work in 24 days. Q can do the samework in 9 days & R can do the same work in 12 days. Q & R start the work and leave after 3 days. P finishes the remaining work in how many days.

Option A: 8

Option B: 10

Option C: 14

Option D: 16

Option E: 19

Ex Output:
Option B

Ex Input:
Question: The amount of an investment will double in approximately 70/ p years, where p is the percent interest, compounded annually. If Thelma invests $ 60,000 in a long-term CD that pays 5 percent interest, compounded annually, what will be the approximate total value of the investment when Thelma is ready to retire 42 years later?

Option A: $ 280,000

Option B: $ 320,000

Option C: $ 360,000

Option D: $ 480,000

Option E: $ 540,000

Ex Output:
Option D

Ex Input:
Question: A bag contains 12 red marbles. If someone were to remove 2 marbles from the bag, one at a time, and replace the first marble after it was removed, the probability that neither marble would be red is 49/64. How many marbles are in the bag?

Option A: 24

Option B: 48

Option C: 60

Option D: 96

Option E: 84

Ex Output:
Option D