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: if y exceeds x by 25 %, then x is less than y by ?
Options: a. 28 %, b. 21 %, c. 20 %, d. 30 %, e. 29 %

A: c
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Q: Problem: mr. loyd wants to fence his square shaped land of 120 sqft each side. if a pole is laid every 12 ft how many poles do he need ?
Options: a. 20, b. 30, c. 40, d. 50, e. 60

A: c
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Q: Problem: the price of lunch for 13 people was $ 207 including a 15 % gratuity for service. what was the average price per person, excluding the gratuity ?
Options: a. 11.73, b. 12, c. 13.85, d. 14, e. 15.87

A:
c
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