A man and a woman have four children. The diagram shows the blood groups of the children. What could be the genotypes of the father and mother?
- A$I^{A}I^{A}$ and $I^{B}I^{O}$
- B$I^{A}I^{B}$ and $I^{O}I^{O}$
- C$I^{A}I^{O}$ and $I^{B}I^{B}$
- D$I^{A}I^{O}$ and $I^{B}I^{O}$