Which compound noun correctly indicates joint possession? Shaun Whites and Jarret Thomas Shaun White and Jarret Thomas' Shaun White's and Jarret Thomas's Shaun Whites' and Jarret Thomas'es

The compound noun that indicates joint possession is: Shaun White and Jarret Thomas'. The apostrophe in Jarret Thomas' name only indicates that the compound noun Shaun White and Jarret Thomas' share the same item. While separate apostrophes for Shaun White's and Jarret Thomas' names indicate that each of them owns the same item separately. The rest of the choices do not indicate ownership nor apply the proper use of apostrophes to indicate ownership.