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.
Q: Problem: priya and her father differ in their ages by 31 years. after 8 years. if the sum of their ages will be 69, their present ages are
Options: a. 11, 42, b. 12, 24, c. 15, 42, d. 16, 19, e. 33, 44
A:
a