Upon Centrifugation of an Antibody Screen Procedure Done by the Gel

Upon centrifugation of an antibody screen procedure done by the gel system, the red blood cell agglutinates are dispersed throughout the gel column with a few agglutinates at the bottom of the microtubes. This reaction should be graded as a:

A) 4+ reaction.
B) 3+ reaction.
C) 2+ reaction.
D) 1+ reaction.