Huntington’s disease is caused by the inheritance of a dominant allele for a gene that affects the brain. The symptoms of the disease include the loss of mental abilities and muscle coordination. A scientist claims that an individual could carry the allele for Huntington’s disease, yet show none of its symptoms. Which feature of Huntington’s disease supports this claim?

A: Huntington’s disease occurs only when two copies of the dominant allele are inherited

B: Huntington’s disease may occur when two copies of the recessive allele are inherited.

C: Huntington’s disease may occur when only one copy of the dominant allele is inherited

D: the symptoms of Huntington’s disease generally being appearing in middle age.