In an Antibody Identification Panel,only One Red Cell Was Negative

Multiple Choice

In an antibody identification panel,only one red cell was negative at the antihuman globulin phase.On ruling out and matching the pattern,an anti-k was identified.What further testing is necessary to confirm the antibody?

A) Two more k-negative cells should be tested.
B) Two more K-negative cells should be tested.
C) Treat the panel cells with enzymes and perform the panel again.
D) Perform an adsorption using "k"-positive cells.