Take context from the input text and decide on the accurate relationship between 'Glencore' and 'Marc Rich' from the options provided.
Options: founded by, platform, business division, chief executive officer

In March, Glasenberg predicted confidently that oil trading - the historic core of the company which began as Marc Rich in the 1970s and was renamed Glencore in the 1990s - could "blow out the lights in 2015".
founded by