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: the ages of 2 persons differ by 32 years. if 12 years ago the elder one be 6 times as old as the younger one, find the present age of elder person.
Options: a. 30, b. 48.5, c. 50.4, d. 62.6, e. 47.9
c