A Girl Had Repeated Attacks of Pneumonia Almost Immediately After

A girl had repeated attacks of pneumonia almost immediately after birth.A blood test taken 3 weeks after birth showed a blood hemoglobin concentration of 4.5% (normal at that age: 15% to 19%) .This could possibly be a serious case of:

A) Sickle cell disease or α-thalassemia but not β-thalassemia.
B) α-Thalassemia but not sickle cell disease or β-thalassemia.
C) Sickle cell disease or β-thalassemia but not α-thalassemia.
D) Sickle cell disease but not α-thalassemia or β-thalassemia.
E) α-Thalassemia or β-thalassemia but not sickle cell disease.