Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

Q: Problem: on the number line, the number p is twice as many units from - 2 as - 2 is from 5. if p is less than – 2, what is the value of p ?
Options: a. – 16, b. – 10, c. – 6, d. 10, e. 14

A: a
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Q: Problem: bottle r contains 350 capsules and costs $ 6.25. bottle t contains 130 capsules and costs $ 2.99. what is the difference between the cost per capsule for bottle r and the cost per capsule for bottle t ?
Options: a. $ 0.25, b. $ 0.12, c. $ 0.0052, d. $ 0.003, e. $ 0.002

A: c
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Q: Problem: two pipes can fill a tank in 12 minutes and 20 minutes respectively. both pipes are opened together and after some time the first pipe is closed and the tank is full in totally 10 minutes. for how many minutes was first pipe open ?
Options: a. 8 minutes, b. 6 minutes, c. 7 minutes, d. 10 minutes, e. 9 minutes

A:
b
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