I don't know. There's no information indicating who might have sold it. It could be the author, an agent representing the author, or in some cases, a previous publisher if they were selling the rights to another party.
It depends on the specific context. If it's a fictional tale, then no. But if it's based on real events or a real person, it could be real to some extent.
Well, without more specific information and reliable verification, it's tough to tell if the Sarah McCormick story is truly accurate. We'd need to investigate further to come to a definite conclusion.
Yes, it might have been sold. There could be various reasons for it to be sold, like if it gained popularity and there was a demand in the market, or perhaps the author decided to sell the rights for adaptation or further distribution.
One common theme is the friendship between Hardcastle and McCormick. Many fanfictions explore how their relationship develops further. Another theme could be adventure, as they often go on exciting adventures in the show, and fanfictions may continue or expand on those scenarios.