Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Problem: if 30 men take 15 days to to complete a job, in how many days can 25 men finish that work ?
Options: a. 18, b. 17, c. 16, d. 15, e. 14
Student:
a