Question: Which American musical theater composer's music is featured in The Apple Tree?
Context: Craig Carnelia (born 1949) is an American musical theater composer and singer, known for his collaboration on the musicals "Working" and "Sweet Smell of Success". Dana P. Rowe is an American musical theater composer whose works have been performed internationally with productions in London’s West End (Theatre Royal Drury Lane, Prince of Wales, The Donmar Warehouse), Russia, Czech Republic, Japan (including Tokyo’s Imperial Garden Theatre), Germany, Australia, New York City, São Paulo, Brazil and Slovenia. The Apple Tree is a series of three musical playlets with music by Jerry Bock, lyrics by Sheldon Harnick, and a book by Bock and Harnick with contributions from Jerome Coopersmith.  Each act has its own storyline, but all three are tied together by a common theme (someone who believes that they want something, but once they get what they wanted they realize that it wasn't what they wanted) and common references, such as references to the color brown.  The first act is based on Mark Twain's "The Diary of Adam and Eve"; the second act is based on Frank R. Stockton's "The Lady or the Tiger? "; the third act is based on Jules Feiffer's "Passionella".  The working title for the evening of three musicals was "Come Back!  Go Away!  I Love You!" Jesus Christ the Apple Tree (also known as Apple Tree and, in its early publications, as Christ Compared to an Apple-tree) is a poem, possibly intended for use as a carol, written in the 18th century.  It has been set to music by a number of composers, including Jeremiah Ingalls (1764–1838) and Elizabeth Poston (1905–1987). Daniel Levine is a musical theater composer.  He wrote the music for the Broadway musical "Anna Karenina" (1992), and received a 1993 Tony Award nomination for Best Original Score.  Levine had also conducted a rendition of "The Entertainer" (1902) by Scott Joplin for Valentino Production Music. Brian Lowdermilk is an American musical theater composer and lyricist. Jerrold Lewis "Jerry" Bock (November 23, 1928November 3, 2010) was an American musical theater composer.  He received the Tony Award for Best Musical and the Pulitzer Prize for Drama with Sheldon Harnick for their 1959 musical "Fiorello! " and the Tony Award for Best Composer and Lyricist for the 1964 musical "Fiddler on the Roof" with Sheldon Harnick. Wearing Someone Else's Clothes is a solo album by musical theater composer Jason Robert Brown.  It was released by Sh-K-Boom Records on June 28, 2005 to generally positive critical reception.  Amazon.com named it as one of its ten Editors' Picks in Broadway and Vocal Albums for 2005.   Brad Alexander (born February 2, 1971) is an American songwriter and musical theater composer, most notably of the musical "See Rock City & Other Destinations", which won the 2011 Drama Desk Award for Outstanding Book of a Musical, the Richard Rodgers Award and the BMI Foundation’s Jerry Bock Award.  He wrote the music and orchestrations for Theatreworks USA’s "Click, Clack, Moo", which premiered Off-Broadway at the Lucille Lortel Theater and received a Drama Desk Award nomination for Outstanding Lyrics and Lucille Lortel Award nominations for Outstanding Choreographer, Outstanding Lyrics and Outstanding Musical.  His songs have been featured on Sony Records, Select Records, Showtime’s The L Word, VH1's “Celebreality” campaign, Sirius XM Radio and web series Submissions Only.  He is a member of the Songwriters Hall of Fame, National Alliance for Musical Theatre, Dramatists Guild of America and member Emeritus of The BMI Lehman Engel Musical Theatre Workshop.  He is married to actress and writer Jill Abramovitz. Steven R. Swayne is a professor of music at Dartmouth College.  He has authored a study of the music of American musical theater composer Stephen Sondheim and a biography of American composer and educator William Schuman.  Swayne is a native of Los Angeles, California and is a graduate of John Muir High School and Occidental College.  He has graduate degrees from Fuller Theological Seminary (MDiv) and the University of California, Berkeley (MA, PhD).  He has taught at UC Berkeley and at the San Francisco Conservatory of Music, and he has worked as a pianist at Nordstrom.  He also plays the piano in concerts and has performed with the San Francisco Symphony under the direction of Michael Tilson Thomas.  He has a Christmas CD called "Holiday Twists" and a CD of the preludes of Frédéric Chopin, Gabriel Fauré, and George Gershwin.  Steve Swayne is currently music department chair for Dartmouth.
Answer: Jerry Bock