Jennifer is trying to determine the blood type of her parents for biology class. She knows that her blood type is A.
After asking her mother, she finds out that her mother's blood type is A. However, her father cannot remember his blood type.
Which of the following blood types could her father have?
I. A
II. B
III. AB
IV. O
A.
II or III only
B.
I, II, III, or IV
C.
I, II, or IV only
D.
I or III only