Question: Who produced the album that "My Apocalypse" is a single on?

Context paragraphs:
Death Magnetic: Death Magnetic is the ninth studio album by American heavy metal band Metallica, released on September 12, 2008 through Warner Bros.  Records.  It was the band's first album to be produced by Rick Rubin, making this their first album since ""Metallica"" (1991) not to be produced by Bob Rock.  The album was the first by the band to feature bass guitarist Robert Trujillo.

L'Instant X: "L'Instant X" (English: "The X Moment") is a 1995 song recorded by the French artist Mylène Farmer.  It was the second single from her fourth album "Anamorphosée" and was released on 12 December 1995.  Directed by Marcus Nispel in New York, the music video depicts with humour the apocalypse and shows Farmer bathing in the foam.  The song became the biggest hit from the album, reaching number six in France, with a long chart trajectory.  In January 2004, the song was the subject of a remix produced by One-T and was released as promotional single.

Skyscraper (song): "Skyscraper" is a song performed by American singer Demi Lovato for her third studio album "Unbroken" (2011).  It was released on July 12, 2011 by Hollywood Records, as the lead single from the album.  The song was written by Toby Gad, Lindy Robbins and Kerli Kõiv and produced by Gad.  It was inspired by a picture of the apocalypse, in which the world was in ruins and among collapsed buildings, one skyscraper was still standing.  When the song was recorded, Lovato was very emotional which triggered outbursts and caused her to start crying.  On November 1, 2010, Lovato entered a treatment facility to deal with her personal struggles.

My Apocalypse: "My Apocalypse" is the forty-first single by American heavy metal band Metallica, and the second from their ninth studio album, "Death Magnetic".  On August 26, 2008, it was made available for streaming on the band's official website, as well as a download (For Platinum Members Only) from the "Death Magnetic" website Mission: Metallica.  This was followed by its availability for purchase as a digital single in the iTunes Store.  At the 2009 Grammy Awards, the single won a Grammy in the "Best Metal Performance" category.  The name of the album (Death Magnetic) is derived from this lyric in the song: "Death magnetic, pulling closer still"

Supporting paragraphs: My Apocalypse Death Magnetic
Answer: Rick Rubin