The offspring produced from a mariiage have only O or A blood groups. Of the genotypes given below, the posiible genotypes of the parents would be
A. `I^(A)I^(A) and I^(A)I^(O)`
B. `I^(O)I^(O) and I^(O)I^(O)`
C. `I^(A)I^(A) and I^(O)I^(O)`
D. `I^(A)I^(O) and I^(O)I^(O)`