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: Which of the following is greatest?

 Option A: 1/10

 Option B: 1/100

 Option C: 1/1000

 Option D: 1/10^9

 Option E: 1/5

A: Option E
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Q: Question: Twelve participants are participating in a competition. In how many ways can the first three prizes be won?

 Option A: 1320

 Option B: 680

 Option C: 820

 Option D: 720

 Option E: 620

A: Option A
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Q: Question: If x is an odd negative integer and y is an even integer, which of the following statements must be true?
I. (3x - 2y) is odd
II. xy^2 is an even negative integer
III. (y^2 ) is an odd negative integer

 Option A: I only

 Option B: II only

 Option C: I

 Option D: I and III

 Option E: II and III

A:
Option C
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