Can Sodium Oxalate and EDTA Be Used for HLA Typing

Can sodium oxalate and EDTA be used for HLA typing, antibody identification, and cross- matching by conventional serologic methods?

A) Yes, as long as the specimen is kept at room temperature.
B) Yes, as long as the specimen is kept at 2-6° C.
C) No, because EDTA and oxalate chelate Mg++ and Ca++.
D) No, because EDTA and oxalate are toxic to white blood cells.