Question: Which of Elan produced series was hosted by Chris Harrison?

Context paragraphs:
OmniTouch: OmniTouch was developed by researchers Chris Harrison, Hrvoje Benko and Andy Wilson at Microsoft Research in 2011.  The work was accepted to and presented at the prestigious 2011 ACM User Interface and Software Technology conference.  Many major news outlets and online tech blogs covered the technology.

Chris Harrison (photographer): Chris Harrison (Christopher Matthew Harrison, born Jarrow 1967) is an English photographer known for his work "which has explored ideas of home, histories and class".

You Deserve It: You Deserve It is an American game show created by Dick de Rijk for American Broadcasting Company (ABC).  The show is hosted by Chris Harrison and Brooke Burns.  In the show, contestants earn money toward a beneficiary.

Chris Harrison (baseball coach): Chris Harrison is a former American baseball coach.  He was the interim head coach of the Michigan Wolverines baseball team from October 2001 to May 2002.  He joined the Michigan coaching staff in September 1995 as an assistant baseball coach under Geoff Zahn; he remained in that position for six years.  During Harrison's single year as head coach, the Michigan baseball team led the Big Ten Conference in pitching but finished the season with a 21-32 record (14-17 in the Big Ten).  Harrison resigned as head coach in late May 2002; he was replaced in June 2002 by Rich Maloney.  Before coaching at Michigan, Harrison was the head baseball coach at The Master's College in Santa Clarita, California, from June 1990 to May 1994.  In 1991, he led the Master's Mustangs to a school record 28 victories and was named the NAIA District 3 Coach of the Year.  Through the 1991 season, he had become the only baseball coach in the school's history with a winning record.  After the team finished at 14-32-2 in 1992, Harrison resigned at the request of school officials.  His overall record at The Master's College was 83-100-2.

Scratch input: In computing, scratch input is an acoustic-based method of Human-Computer Interaction (HCI) that takes advantage of the characteristic sound produced when a finger nail or other object is dragged over a surface, such as a table or wall.  The technique is not limited to fingers; a stick or writing implements (e.g. chalk, or a pen) can also be used.  The sound is often inaudible to the naked ear (i.e., silent).  However, specialized microphones can digitize the sounds for interactive purposes.  Scratch input was invented by Mann et al. in 2007, though the term was first used by Chris Harrison et al.

Elan Gale: Elan Gale (born October 27, 1983) is a television producer, best known for his series "The Bachelor".  He has also produced "The Bachelorette", "Bachelor Pad", "Bachelor in Paradise" and "High School Reunion".

Designers' Challenge: Designers' Challenge was a show that aired on HGTV in the United States.  In each episode, three interior designers make presentations to a homeowner, who chooses one design to use in the house.  It was hosted by Chris Harrison.

Mall Masters: Mall Masters is the name of a game show from Stone-Stanley that aired on GSN, from April 1 to August 31, 2001, with reruns airing until December 1, 2001.  The show was hosted by Chris Harrison.  Three contestants competed to test their knowledge of pop culture.  The show was taped at the Camp Snoopy Theater inside the Mall of America in Minneapolis during November and December 2000.  Most of the contestants were from the Minneapolis area, many working at the mall itself.  Though the theater was on an upper level in the mall, the video production truck was located a half mile away in the basement loading docks.  Post production was done in Los Angeles.

The Bachelor (U.S. TV series): The Bachelor is an American reality television dating game show that debuted on March 25, 2002, on ABC.  The show is hosted by Chris Harrison.  The show's success has resulted in several spin-offs including "The Bachelorette", "Bachelor Pad", "Bachelor in Paradise", and "".

Hollywood 411: Hollywood 411 is an entertainment news and gossip television show that originally aired premiered on August 12, 2005 but later premiered on January 14, 2008 on the TV Guide Network and is hosted by Chris Harrison.  The show was previously hosted by Madison Michele with guest hosts Marc Istook, Tanika Ray, and Rosanna Tavarez.  The show includes celebrity interviews and previews of TV shows and movies.

Supporting paragraphs: Elan Gale The Bachelor (U.S. TV series)
Answer: The Bachelor