What is the purpose of using a 'two-stage' crossmatch technique in blood banking?

A To detect ABO incompatibility
B To detect Rh incompatibility
C To detect non-ABO antibodies
D To reduce the risk of hemolysis due to clerical errors
The two-stage crossmatch technique is used to detect non-ABO antibodies, which can cause a hemolytic transfusion reaction.
Transfusion Medicine textbook
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Hard MEDICAL Confidence: medium