All of the Following Are True Regarding Antibody Titration of Maternal

Multiple Choice

All of the following are true regarding antibody titration of maternal IgG antibodies except:

A) the method must include the indirect antiglobulin test.
B) the difference of two or more dilutions between titrations is considered significant.
C) red blood cells should consist of the same genotype for each titration.
D) the first serum specimen should be run in parallel with all subsequent titrations.