General Motors Co. GM -1.07 % Chief Executive Mary Barra said earlier this week she sees no need to follow Ford’s move because she is confident the company can profitably build its small cars in the U.S. GM builds its Chevy Sonic subcompact and Cruze compact in the Midwest.
In the context of the input sentence, determine the relationship between 'Mary Barra' and 'General Motors'.
Options: distributed by, chairperson, publisher, employer