During an Antibody ID, There Was 1+ Reaction at AHG

Multiple Choice

During an antibody ID, there was 1+ reaction at AHG with donor cells with the antigen profile Fya(+) , Fyb(-) . All other donor cells on the panel were negative, including those that were Fya(+) , Fyb(+) . Given these results, what might be the conclusion?

A) Single antibody (showing dosage)
B) Probably an antibody not represented on the antigen profile
C) An antibody to a high-frequency antigen
D) IgM antibody