Which answer choice best corrects the run-on sentence?

The boy has on a cowboy shirt it is covered in mud.

Responses

The boy has on a cowboy shirt, it is covered in mud.
The boy has on a cowboy shirt, it is covered in mud.

The boy has on a cowboy shirt. Covered in mud.
The boy has on a cowboy shirt. Covered in mud.

The cowboy shirt is covered in mud the boy has on.
The cowboy shirt is covered in mud the boy has on.

The boy has on a cowboy shirt. It is covered in mud.

The boy has on a cowboy shirt. It is covered in mud.