The replacement of chlorine of chlorobenzene to give phenol requires drastic conditions, but the chlorine of 2,4-dinitrochlorobenzene is readily replaced since
A. nitro group makes the aromatic ring electron rich at ortho/para-position
B. nitro group withdraw electrons from the meta-position of the aromatic ring
C. nitro group withdraws electrons from ortho/para-positions of the armatic ring.
D. m-nitrochlorobenzene is formed in excess
