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: In the arithmetic sequence t1, t2, t3, ..., tn, t1=23 and tn= tn-1 - 3 for each n > 1. What is the value of n when tn = 8?

Option A: -1

Option B: 6

Option C: 10

Option D: 14

Option E: 20

Output: Option B

Input: Consider Input: Question: A rectangular plot measuring 90 metres by 50 metres is to be enclosed by wire fencing. If the poles of the fence are kept 10 metres apart, how many poles will be needed ?

Option A: 28

Option B: 56

Option C: 57

Option D: 58

Option E: None of these

Output: Option A

Input: Consider Input: Question: A person is traveling at 100 km/hr and reached his destiny in 5 then find the distance?

Option A: 250km

Option B: 300km

Option C: 500km

Option D: 450km

Option E: 350km
Output: Option C