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: Sum of 19 odd numbers is?

 Option A: 341

 Option B: 351

 Option C: 361

 Option D: 371

 Option E: 381

A: Option C
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Q: Question: Which of the following is always true for any real number 'a' and 'b'?

 Option A: |ab| = |a||b|

 Option B: |a/b| = |a|/|b|

 Option C: |-ab| < |a||b|

 Option D: |ab| > |a/b|

 Option E: |ab| = -|ab|

A: Option A
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Q: Question: A person says that their speed while going to a city was 10mph however while
returning as there is no much traffic they came with a speed of 15mph. what is their
average speed?

 Option A: 12

 Option B: 13

 Option C: 14

 Option D: 15

 Option E: 16

A:
Option A
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