Bill wants to determine his blood type, so he takes a few drops of blood from a puncture wound in his finger and mixes it with various antisera. His blood cells agglutinate when mixed with the anti-A sera but not with the anti-B or anti-D sera. This means
a. Bill's plasma contains B antibodies
b. Bill's red blood cells contain the O surface antigen.
c. Bill could donate blood to an individual with type O blood
d. Bill could receive type B-negative blood in a transfusion
e. Bill is Rh positive
Answer: A