29.Which option below outlines an effective method for relocating the position of a π bond?
(A)tSubstitution, followed by addition
(B)tAddition, followed by substitution
(C)tElimination, followed by addition
(D)tAddition, followed by elimination
(E)tNone of the above
答案：D
統計：A:0,B:1,C:1,D:4,E:0
難度：計算中