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.

Example Input: Question: If 6 (A's capital) = 8 (B's capital) = 18 (C's capital). Then the ratio of their capitals is?

Option A: 12:15:16

Option B: 12:15:4

Option C: 12:9:4

Option D: 20:15:11

Option E: 20:15:19
Example Output: Option C

Example Input: Question: Today Joelle opened an interest-bearing savings account and deposited $5,000. If the annual interest rate is 5 percent compounded interest, and she neither deposits nor withdraws money for exactly 2 years, how much money will she have in the account?

Option A: $6512.50

Option B: $7512.50

Option C: $5512.50

Option D: $4512.50

Option E: $5250.00
Example Output: Option C

Example Input: Question: There are 15 slate rocks, 20 pumice rocks, and 10 granite rocks randomly distributed in a certain field. If 2 rocks are to be chosen at random and without replacement, what is the probability that both rocks will be slate rocks?

Option A: 1/3

Option B: 7/22

Option C: 1/9

Option D: 7/66

Option E: 2/45
Example Output:
Option D