Honda 's HR-V, based on the subcompact Fit, has sold over 20,000 copies in the U.S. after just a few months on the market, while General Motors ' ( NYSE:GM ) similarly sized Chevy Trax and Buick Encore have together sold about 70,000 so far in the U.S. in 2015.
Take context from the input text and decide on the accurate relationship between 'Buick' and 'General Motors' from the options provided.
Options: parent organization, founded by, position held, owned by