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 tank contains 10,000 gallons of a solution that is 5 percent sodium chloride by volume. if 2,500 gallons of water evaporate from the tank, the remaining solution will be approximately what percent sodium chloride ?
Options: a. 1.25 %, b. 3.75 %, c. 6.25 %, d. 6.67 %, e. 11.7 %
Student:
d