Critical Reasoning (CR) | Re: For the average person who needs a transfusion

For the average person who needs a transfusion, blood from a relative is more likely to be infected with hepatitis than is blood from a blood bank. Therefore, the risk of contracting hepatitis from a transfusion is higher for people receiving blood from relatives than for people receiving blood from blood banks.

Which one of the following, if true, most seriously weakens the argument?

(A) People receiving blood transfusions often specify that blood from
...

---