Take context from the input text and decide on the accurate relationship between 'Buick' and 'General Motors' from the options provided.
Options: owned by, business division, subsidiary, chief executive officer

Post to Facebook GM may export China-made Buick to U.S. General Motors is close to becoming the first major automaker to sell a China-made vehicle in the U.S. in a move that could fuel political consternation over the decline of the American manufacturing sector.
owned by