Hashi is the only one free. However now that they aren't restricted, Tobirama will likely free himself and then free the other two kages when he feels like.
Also you should edit the Poll because neither are correct options because some are and others aren't. If you can edit a poll that is lol idk if you can :/
Well Hashirama's A boss already free!!!XD
But m not sure about the rest....Bcoz its nowhere shown in the manga that they have full control over themselves!!!