In this article the author states that blood test has______.

A．your blood type is not decided by your red cells
B．your blood type is decided by the antigens in your red cells
C．your blood type is decided by the A, B or AB antigens
D．your blood type is decided by the different kind of serum

A．Because they are like boxes
B．For they are made from wood
C．Because they are black churches
D．For they are located on country roads