A Young Woman's Mother Has Been Diagnosed with BRCA Gene-Associated

A young woman's mother has been diagnosed with BRCA gene-associated breast cancer,an autosomal dominant genetic disorder.She asks the nurse about the inheritance patterns of this disorder.On what knowledge will the nurse base the response to this young woman?

A) Most affected offspring of autosomal dominant disorders are males.
B) The young woman's mother had unaffected parents who were heterozygous for the gene.
C) The young woman has a 50% chance of having the mutated gene if her mother is heterozygous.
D) Daughters of women who are heterozygotic with an autosomal dominant disorder are usually carriers of the gene.