LaToya has type A blood, and Gerald has type B blood. Their daughter has type O blood. Can Gerald be the baby daddy? He is a bit worried

Please complete the Punnett square(s) to determine the possibilities.
a Yes, if both parents are heterozygous
b No, this is impossible
c Yes, if one parent is heterozygous
d No, type B blood must be homozygous

c Yes, if one parent is heterozygous