Assume that (B) is dominant and (b) is recessive: bb mates with bb All the offspring will show the recessive trait
All the offspring will show the dominant trait
About 50% of the offspring will show the recessive trait
About 75% of the offspring will show the dominant trait

If b is recessive and bb mates with bb the offspring would show the recessive trait, so A.

Codominance is when alleles have the same amount of dominance and both are expressed in a heterozygous individual(ab blood type, roan cow). in a heterozygote with incomplete dominance, the phenotype seen is an intermediate of the dominant and recessive phenotype.(pink flowers when the dominant form is red snd recessive form is white)