Which of the following statements about nucleophilic aromatic substitution is true? Multiple Choice A. The elimination-addition mechanism is not as common as the addition-elimination mechanism. B. For the elimination-addition pathway, the nucleophile becomes attached only at the site bearing the leaving group. C. For the addition-elimination pathway, the nucleophile may become attached either at the site bearing the leaving group or at the site bearing the ortho hydrogen atom D. In the addition-elimination mechanism, the aromatic ring first accepts a pair of electrons from a nucleophile to form a cationic intermediate
