题目内容：
Furthermore, the great athletic contests and artistic competitions had a continually renewed unifying effect. (Unit 3: Ancient Greece) The underlined words “unifying effect” in this sentence means that （）.
A.the Greek city-states were becoming a unified single nation
B.the Hellenes considered themselves as one people
C.the Hellenes believed in the unity of body and soul
D.the Hellenes were unified in their perceptions of the world
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