You are right, but that is not a question.
A.) I was thrilled to find my keys they had been lost since yesterday.
This is a "fused sentence" or also known as a run-on sentence.
Answer:
Yes 14 year olds should have jobs.
Explanation:
I think 14 year olds should have jobs because it will teach them about life at a young age. It also teaches them how to be responsible.