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.

Problem: in a restaurant, the profit is 160 % of the cost. if the cost increases by 12 % but the selling price remains constant, approximately what percentage of the selling price is the profit ?
Options: a. 30 %, b. 57 %, c. 90 %, d. 100 %, e. none of these
b