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.

Example Input: Problem: 10, 1000, 100000, 10000000....
Options: a. 100, 000,000, b. 1,000, 000,000, c. 1, 000,000, 000,000, d. 100, e. 1, 000,000
Example Output: b

Example Input: Problem: a company produces 50000 bottles of water everyday. if a case can hold 25 bottles of water. how many cases are required by the company to hold its one day production
Options: a. 2000, b. 4500, c. 5000, d. 8000, e. 9000
Example Output: a

Example Input: Problem: of the families in city x in 2000, 30 percent owned a personal computer. the number of families in city x owning a computer in 2004 was 20 percent greater than it was in 1994, and the total number of families in city x was 10 percent greater in 2004 than it was in 2000. what percent of the families in city x owned a personal computer in 1998 ?
Options: a. 55.42 %, b. 52.25 %, c. 56.23 %, d. 30.70 %, e. 32.72 %
Example Output:
e