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 certain population of bacteria doubles every 10 minutes. If the number of bacteria in the population initially was 10^5, then what was the number in the population 50 minutes later?

 Option A: 2(10^5

 Option B: 5(10^5

 Option C: (2^5

 Option D: (10^5

 Option E: (10^5

A: Option C
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Q: Question: Square A is inscribed in circle B. If the perimeter of A is 32, what is the circumference of B?

 Option A: 6√ 2π

 Option B: 4√ 2π

 Option C: 8√ 2π

 Option D: 7√ 2π

 Option E: 5

A: Option C
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Q: Question: Points M(-15,2) and N(5,-5) lie on the xy - plane. What is the midpoint of line segment MN?

 Option A: (5,0

 Option B: (0,5

 Option C: (0, (136^(1/2

 Option D: (-5,-3/2

 Option E: (1,5

A:
Option D
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