Free ear lobes are dominant over attached ear lobes. What will be the phenotypic ratios of the offspring from a cross between two heterozygous free earlobed parents?

a.3 free earlobe: 1 attached earlobe
b.1 free earlobe; 0 attached earlobe
c.3 attached earlobe: 1 free earlobe
d.0 attached earlobe: 0 free earlobe