If a mother has an AB blood type and her daughter has BB blood type, The dad has AA blood, the mailman has type AO blood and the neighbor has BO blood. Which one is really the father?
A. the dad
B. the mailman
C. the neighbor
D. none of them

c. neighbor

Explanation:

half the mother, half by fathee

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.