Which of the Following Statements About Nucleophilic Aromatic Substitution Is

Which of the following statements about nucleophilic aromatic substitution is true?

A) 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.
B) For the elimination-addition pathway,the nucleophile becomes attached only at the site bearing the leaving group.
C) The elimination-addition mechanism is not as common as the addition-elimination mechanism.
D) In the addition-elimination mechanism,the aromatic ring first accepts a pair of electrons from a nucleophile to form a cationic intermediate.