I'll give you a question, please answer with step-by-step reasoning process. When you haven't seen someone since they were young and years have passed what has happened to them?
Options:
- senior
- grow
- mature
- old
- aged

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
After years have been passed, the young person becomes aged. As years have passed so someone may become aged when you haven't seen someone since they were young.
The answer: aged.