The possible blood types are A and B.
The phenotype of the mother is AB, so the genotype can only be AB.
The father's phenotype is O so his genotype should only be OO.
if we cross between AB and OO it gives us either AO or BO, so the possible phenotypes are either A (if the genotype is AO) or B (if the phenotype is BO).
Having sex and having the hiv touch a open wound that lets it get into your blood stream I think
It entail's the level of knowledge you have.
The answer seems to be all of the above but d) might be the right answer
