See question below:
One of the following sentences is nonsensical. Which one is it?
Options:
- Sentence A: "This fossil has existed for tens of thousands of years."
- Sentence B: "This people has existed for tens of thousands of years."

Reason slowly and give your answer.

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
Average life of humans is limited to near about 80-120.
The final answer: Sentence B.