Keysha's Mother Is Homozygous for a Dominant Allele for Unattached

Multiple Choice

Keysha's mother is homozygous for a dominant allele for unattached earlobes and her father is heterozygous for a recessive allele for attached earlobes. Keysha has two siblings. What of the following is a true statement about Keysha and her siblings?

A) Keysha and her siblings will all have the same genotype.
B) Keysha and her siblings will all have the same phenotype.
C) Keysha and her siblings will all have attached earlobes.
D) Keysha, but not her siblings, will have unattached earlobes.