Chrysler executive Scott Garberding said in court on Tuesday that Chrysler had explored tie-up deals with Nissan and General Motors prior to the current proposed deal with Fiat, but they fell apart as the U.S. economy worsened.
Refer to the input text as context and select the correct relationship between 'Chrysler executive' and 'Chrysler' from the available options.
Options: owner of, chief executive officer, brand, manufacturer