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: a can run 4 times as fast as b and gives b a start of 60 m. how long should the race course be so that a and b might reach in the same time ?
Options: a. 70 m, b. 60 m, c. 80 m, d. 65 m, e. 75 m
Student:
c