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.
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Question: Problem: at the wholesale store you can buy an 8 - pack of hot dogs for $ 1.55, a 20 - pack for $ 3.05, and a 250 - pack for $ 22.95. what is the greatest number of hot dogs you can buy at this store with $ 205 ?
Options: a. 1,108, b. 2,100, c. 2,140, d. 2,124, e. 2,256

Answer: c

Question: Problem: if the radius of a cylinder is made 3 times and so is the height, what is the new volume of the cylinder divided by the old one ?
Options: a. 27., b. 2., c. 6., d. 4., e. 10.

Answer: a

Question: Problem: a worker can load one truck in 6 hours. a second worker can load the same truck in 4 hours. if both workers load one truck simultaneously while maintaining their constant rates, how long, in hours, will it take them to fill one truck ?
Options: a. 2.1, b. 2.4, c. 2.7, d. 3.0, e. 3.3

Answer:
b