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.

Q: Question: A train running at the speed of 60 km/hr crosses a pole in 21 seconds. What is the length of the train?

 Option A: 350 m

 Option B: 278 m

 Option C: 876 m

 Option D: 150 m

 Option E: 267 m

A: Option A
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Q: Question: Let f(x) = x^2 + bx + c. If f(1) = 0 and f(-8) = 0, then f(x) crosses the y-axis at what y-coordinate?

 Option A: -8

 Option B: -1

 Option C: 0

 Option D: 1

 Option E: 8

A: Option A
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Q: Question: The population of a town increased from 1,34,000 to 2,32,500 in a decade. The average percent increase of population per year is:

 Option A: 4.37%

 Option B: 7.3%

 Option C: 7.6%

 Option D: 8.75%

 Option E: None

A:
Option B
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