Question: Nasty Gal was a retailer founded by the businesswoman of what nationality?

Context paragraphs:
Arvida Byström: Arvida Byström is a Swedish artist born in 1991 near Stockholm, who is mainly known as a photographer and model but who also makes music.  She is based in Los Angeles, London and Stockholm.  She cooperates with many magazines and brands such as Nasty Gal, Monki, "Wonderland Magazine", "Lula Magazine", "Vice", "Rookie mag", "Garage magazine", "Baby Baby Baby magazine" and "I heart magazine".

ABC Fine Wine &amp; Spirits: ABC Fine Wine & Spirits is a family-owned, privately held American alcohol retailer founded by Jack Holloway in 1936.  ABC Fine Wine & Spirits is Florida's oldest and largest independent retailer of fine wine and spirits.  The company is headquartered in Orlando, Florida and has nearly 150 stores located in the state, with a 2013-14 revenue of nearly $500 million.

Jamie Gunns: Jamie Elizabeth Gunns (30 November 1985 in Lambeth, London, England) is a British fashion model.  Early in her career, Gunns was an editorial model whose clients included the like of Roberto Cavalli and Chanel.  Currently, Gunns has become popular on the internet due to her appearance in online retailers such as ASOS.com, Bon Prix, Nasty Gal, Nordstrom, Nelly, and Littlewoods.

Barbara Bestor: Barbara Bestor is an American architect based in Los Angeles, California.  She is the principal of Bestor Architecture, founded in 1992.  Examples of her work include the Beats Electronics Headquarters in Culver City, the Nasty Gal Headquarters in downtown Los Angeles, Intelligentsia Coffee & Tea in Los Angeles, and the Toro Canyon House in Santa Barbara.  In 2015 she married director Tom Stern.  In 2017 she was elected to the AIA's College of Fellows.

Total Wine &amp; More: Total Wine & More is a family-owned, privately held American alcohol retailer founded and led by brothers David and Robert Trone.  Total Wine & More is the largest U.S. independent retailer of fine wine.  Total Wine & More was named Retailer of the Year by Market Watch in 2006, Beverage Dynamics in 2008, and Wine Enthusiast Magazine in 2004 and 2014.  The company is headquartered in Bethesda, Maryland.

Sophia Amoruso: Sophia Christina Amoruso (born April 20, 1984) is an American businesswoman.  At age 23, she started an online eBay store selling vintage clothing and other items, which she named "Nasty Gal Vintage".

HoneyBaked Ham: HoneyBaked Ham is a food retailer founded in 1957.  It sells hams, turkey breasts and other pre-cooked entrées, side dishes, and desserts.  It was founded in Detroit, Michigan, its headquarters are located Alpharetta, GA today.

The Perfume Shop: The Perfume Shop is a United Kingdom perfume retailer founded in 1992.  The company was acquired by the world's largest health and beauty retailer, A.S. Watson Group in 2005.  The company is based in High Wycombe, Buckinghamshire, with a distribution centre in Dunstable.  It is the second largest fragrance retailer in the UK.

Nasty Gal: Nasty Gal is an American retailer that specializes in fashion for young women.  The company has more than 550,000 customers in over 60 countries.  Founded by Sophia Amoruso in 2006, Nasty Gal was named “Fastest Growing Retailer” in 2012 by INC Magazine.  Nasty Gal is based in Los Angeles.  Amoruso originally began selling vintage clothes from her eBay account, and later switched to sell its own label of clothes, on her own website.  In 2017, the company was purchased by the BooHoo Group out of chapter 11 of the U.S. bankruptcy code.

Firebox.com: Firebox.com is an online retailer based in London, England, that was created in 1998 as hotbox.co.uk, an internet retailer founded by university friends Michael Acton Smith and Tom Boardman.  Their inventory covers many different products from baby toys to high-tech gadgets.

Supporting paragraphs: Nasty Gal Sophia Amoruso
Answer: American