Take context from the input text and decide on the accurate relationship between 'Buick Verano' and 'Buick' from the options provided.
Options: operator, brand, publisher, chairperson

GM also declined to comment on reports that in 2016 it would shift production of the Buick Verano sedan from Michigan to China; production of the Buick Regal from Canada to either China or Europe; and also start importing the Buick Cascade convertible from Europe.
brand