Which of the Following Statements Regarding Blood-Type Incompatibilities Between a Mother

Multiple Choice

Which of the following statements regarding blood-type incompatibilities between a mother and her fetus is TRUE?

A) An Rh-negative fetus may be at risk if its mother is Rh-positive.
B) An Rh-positive fetus may be at risk if its mother is Rh-negative.
C) A fetus with type B blood may be at risk if its mother has type O blood.
D) The risk to an Rh-positive fetus of an Rh-negative mother is lessened if she has previously carried an Rh-negative fetus.
E) The greatest risk to a fetus occurs when both mother and fetus are Rh-positive.