A 23-year-old man of nohern European lineage presents with anemia. His father and paternal aunt had a similar illness that was treated successfully by splenectomy. His peripheral blood smear is similar to that shown in the illustration. Which of the following additional abnormalities is expected?
A
Bilirubinuria
B
high mean corpuscular volume
C
Increased direct (conjugated) serum bilirubin
D
Polychromatophilic erythrocytes on peripheral blood smear