Question

Read these sentences.

When Harold went racing down the hill on his sled. He hit a large bump and flew into the air, and landed safely on the ground.

How is the sentence fragment best corrected?
When Harold went racing down the hill on his sled. He hit a large bump and flew into the air. And, landed safely on the ground.
When Harold went racing down the hill on his sled, he hit a large bump, flew into the air, and landed safely on the ground.
When Harold went racing down the hill on his sled, he hit a large bump and flew into the air. And, landed safely on the ground.