Refer to the input text as context and select the correct relationship between 'Glencore' and 'Marc Rich' from the available options.
Options: chief executive officer, founded by, business division, platform

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