Human blood groups are governed by three alleles: I^A, I^B, and i. I^A and I^B are codominant and i is recessive to both. A man who has type B blood and a woman who has type A blood could have children of which of the following phenotypes?

• A. A or B only
• B. AB only
• C. AB or O
• D. A, B, or O
• E. A, B, AB, or O