15. Which of the following is aromatic?
(A) cycloheptatrienyl cation
(B) 1,3,5-hexatriene
(C) cyclobutenyl anion
(D) 1,3-cyclohexadiene
(E) cyclopentadienyl cation

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統計： A(0), B(0), C(1), D(0), E(0) #3829714