Hannah and George Disagree

Hannah and George disagree.Hannah argues that people within an ethnic group all share the same culture.George,by contrast,argues that people of the same ethnic group may or may not share the same culture.Who is right?

A) Hannah,because sharing the same culture defines an ethnic group.
B) George,because diversity exists among people within an ethnic group.
C) Hannah is correct when referring to ethnic groups within the United States;George is right when referring to ethnic groups in the entire world.
D) Hannah is correct when the persons in the ethnic group all share the same socioeconomic status;George is correct when the persons in the ethnic group do not share the same socioeconomic status.