Patient MM

Patient M.M. was admitted to the hospital with acute bleeding. Anti-E was detected in the patient's serum. Four E-negative units of blood were crossmatched for the patient. The units were compatible at immediate spin and following the antiglobulin test. After the antiglobulin test was performed, IgG sensitized red cells gave a 2+ agglutination reaction. The proper interpretation of this 2+ agglutination reaction is the:

A) antihuman globulin washing procedure was adequate.
B) IgG-sensitized red cells spontaneously agglutinated.
C) crossmatch was incompatible.
D) patient's anti-E reacted with the IgG-sensitized red cells.