Spielberg then revisited his Close Encounters project and, with financial backing from Columbia Pictures, released Close Encounters: The Special Edition in 1980. For this, Spielberg fixed some of the flaws he thought impeded the original 1977 version of the film and also, at the behest of Columbia, and as a condition of Spielberg revising the film, shot additional footage showing the audience the interior of the mothership seen at the end of the film (a decision Spielberg would later regret as he felt the interior of the mothership should have remained a mystery). Nevertheless, the re-release was a moderate success, while the 2001 DVD release of the film restored the original ending.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Which studio released the 1977 version of Close Encounters?
unanswerable