Replacement of Cl of chlorobenzene to give phenol requires drastic conditions, but Cl of 2,4-dinitrochlorobenzene is readily replaced. This is because
A. `-NO_(2)` group makes the ring electron rich at ortho and para position
B. `-NO_(2)` group withdraws electrons from position
C. `-NO_(2)` donates electrons at meta position
D. `-NO_(2)` withdraws electrons from ortho and para position.