Susan, a mother with type B blood, has a child with type O blood. She claims that James, who has type A blood, is the father. He claims that he is not the father. Blood and DNA tests ordered by the judge reveal that James is homozygous dominant for type A blood. The judge rules that

a. James is right, he can not be the father

b. Susan is right, James is the father

c. Susan is not the real mother of the child and an error was made in the nursery

d. It is impossible to make a decision based on the limited data available