It is a that is what I think
Answer:
They are codominant
Explanation:
There are 3 different alleles: IA, IB and i - IA and IB are codominants, i is recessive. Codominance means neither allele can mask the expression of the other and both alleles A and B are expressed in the blood type.
It's both B.They can never be depleted and C.They are replaceable by natural means.
Answer:
the answer should be option A