Answer:
Answer B Pierre speaks French
Explanation:
Answer B is the best answer because oxford dictionary defines Ethnicity as "the fact or state of belonging to a social group that has a common national or cultural tradition" Pierre speaking French is a very common national tradition (assuming he is in France). This questions is a difficult one because all of these seem like an ethnic group but since people that belong to a religion would be part of a religious group instead of an ethnic group that leads me to believe that Answer B is the correct answer.
Hope this helps
