Which of the following statements about blood groups/transfusions is true? A. A major crossmatch is a mixture of donor RBCs with potential recipient plasma. B. Blood group genotypes are A, B, AB, and...

Which of the following statements about blood groups/transfusions is true?

A. A major crossmatch is a mixture of donor RBCs with potential recipient plasma.

B. Blood group genotypes are A, B, AB, and O.

C. The agglutination of type-A RBCs transfused into a patient with type-B blood is an  example of a minor transfusion reaction.

D. Blood group AB is the universal donor.