Utilize the input text as a context reference, choose the right relationship between 'Buick' and 'General Motors' from the options.
Options: director/manager, legal form, owned by, parent organization

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.
parent organization