Which of the Following Scenarios Illustrates a Case of Ethnocentrism

Which of the following scenarios illustrates a case of ethnocentrism?

A) Liam, a millwright from Kentucky, ignores input from engineers at his tractor company's Japanese subsidiary because he believes Americans build the best tractors.
B) T.J., a television producer from California, goes out of his way to share ideas and methods with other producers from India, South Korea, and Hollywood.
C) Chad, a fisherman from Alaska, has tried using nets manufactured in Japan and Russia, but finds his American-made nets perform slightly better.
D) Nelson, a civil engineer from New York, comes off as pushy and rude when he visits engineering firms in Nordic Europe.
E) Orlando, an architect from Missouri, is fascinated by the culture he encounters when his company sends him to Scandinavia.