Folk Singer Arlo Guthrie, Whose Father Died of Huntington's Disease

Folk singer Arlo Guthrie, whose father died of Huntington's disease, had the opportunity to obtain genetic testing to ascertain if he had inherited the gene that would cause this disease.
What did Arlo decide and what was the outcome?

A) He had genetic testing and was found not to be genetically susceptible.
B) He chose not to have genetic testing and did not develop the disease.
C) Genetic testing found that he was a carrier and he was successfully treated.
D) He chose not to have genetic testing but is now incapacitated by the disease.