A r(A)=m B r(A)=n C 0<r(A)<n D A=0

A -1 B -2 C -3 D -4

A (-4，2，2) B <img src="https://www.beizhujiaoyu.com/uploads/202208/161267516738471.png" width="73" height="53" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/161267517126961.png" width="90" height="54" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/161267517781971.png" width="108" height="90" />