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: The average weight of 10 person's increases by 4 kg when a new person comes in place of one of them weighing 70kg. What is the weight of the new person?

Option A: 85

Option B: 86.5

Option C: 90

Option D: 88.5

Option E: 110

Ex Output:
Option E

Ex Input:
Question: A train speeds past a pole in 15 sec and a platform 140 m long in 25 sec, its length is?

Option A: 210

Option B: 150

Option C: 160

Option D: 170

Option E: 180

Ex Output:
Option A

Ex Input:
Question: If $ 5,000 is invested in an account that earns 12% interest compounded semi-annually, then the interest earned after one year would be how much greater than if the $ 5,000 had been invested at 8% simple yearly interest?

Option A: $ 4

Option B: $ 8

Option C: $ 12

Option D: $ 16

Option E: $ 432

Ex Output:
Option C