31. According to the passage, the flat-topped mounds in Mississippian towns were used for all of the following purposes EXCEPT
(A) religious ceremonies
(B) meeting places for the entire community
(C) sites for commerce
(D) burial sites
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統計: A(0), B(9), C(3), D(1), E(0) #801704
統計: A(0), B(9), C(3), D(1), E(0) #801704