In 2014, the Buick line sold 919,582 vehicles in the country – almost four times higher than the 228,963 units of Buick sold in the U.S. General Motors believes that its sales volume for Buick in the U.S will not be large enough to justify the establishment of a plant in U.S.
Analyze the relationship between 'Buick' and 'General Motors' within the context of the input sentence.
Options: parent organization, chairperson, business division, owned by