A male client of a nurse practitioner has an autosomal dominant disorder. The client and his partner ...

A male client of a nurse practitioner has an autosomal dominant disorder. The client and his partner are considering starting a family.
 
  Which of the following statements indicates the client has an adequate understanding of the genetic basis of this health problem?
  A)
  I know there's no way of accurately determining the chance that my child will inherit the disease.
  B)
  My children who don't have the disease still run the risk of passing it on to their children.
  C)
  I know that new genetic mutations won't occur between generations.
  D)
  I know that a single mutant allele is to blame for the health problem.