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.

Input: Consider Input: Question: 8 persons can build a wall 140m long in 42 days. In how many days can 30 persons complete a similar wall 100 m long?

Option A: 12

Option B: 10

Option C: 8

Option D: 6

Option E: 5

Output: Option C

Input: Consider Input: Question: In a local school district, the high school and middle school each received r dollars toward funding for the student arts program. The high school enrolled 600 students and the middle school enrolled 300 students. Later, the middle school transferred s dollars to the high school so that they would have received the same funding per student. Which of the following is equivalent to s?

Option A: r/3

Option B: r/2

Option C: 2r

Option D: 3r

Option E: r/9

Output: Option A

Input: Consider Input: Question: Let each different arrangement of all the letters of DELETED be called a word. In how many of these words will the D's be separated?

Option A: 150

Option B: 200

Option C: 300

Option D: 350

Option E: 400
Output: Option C