The replacement of chlorine of chlorobenzene to give phenol requires drastic conditions, but the chlorine of 2,4-dinitrochlorobenzene is readily replaced since
A. `NO_(2)` makes the electron rich ring at ortho and para positions
B. `NO_(2)` withdraws electrons at meta position
C. `NO_(2)` donate electrons at m-position
D. `NO_(2)` withdraws electrons at ortho and para positions