Number three because the rest use commas
The story, Through the tunnel, is about a boy named Jerry and is 11 years old. In this story a Jerry goes to the beach with his mother on vacation. Jerry is a boy who would do almost anything to become a friend with someone. In this story Jerry tries to impress these foreign boys by trying to swim through a tunnel.
Once I had to sing karoke and I was holding back, but when I began to sing my favorite song I had tons of fun!
Scrooge could be missing his old friend because he was there at a time Scrooge was still a good person before they both were taken over by money