Clark Brands formerly Clark Oil began as Clark's Super Gas and was a 20th-century oil company headquartered in Milwaukee Wisconsin.Founded by Emory T. Clark in 1932 as a single filling station on the corner of 60th St. and Greenfield Ave. in West Allis Clark Super Gas sold only premium gasoline. Unlike most contemporary service stations Clark stations did not offer mechanical maintenance and tire changing.In 1943 the company moved into refining oil. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Company