Definition: You are given a question on prehistory. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: The Hopewell were complex rank societies, but they were not a state. Hopewell culture lacked all of the following elements EXCEPT:
(A)formal government (B)monumental earthworks (C)urban centers (D)a permanent military

B