What rock opera did The Who release in 1969?

The Who released the rock opera Tommy in 1969.

Tommy was the band's fourth studio album and was released in May 1969. Written primarily by guitarist Pete Townshend, it tells the fictional story of Tommy Walker, a boy who becomes deaf, dumb and blind after a traumatic event, then develops into a spiritual figure. The album's connected songs made it one of rock music's landmark extended works.

Tommy was recorded in London between September 1968 and March 1969. It included well-known songs such as “Pinball Wizard,” “I'm Free” and “See Me, Feel Me.” The Who performed sections of it live, including at Woodstock later that year. The other choices are easy to mix up: The Who Sell Out was released in 1967, Quadrophenia in 1973, and Lifehouse was an unfinished project rather than the 1969 rock opera album.