Which of the Following Is True with Regard to Prognosis

Which of the following is true with regard to prognosis in patients with ALS?

A) Older age at onset is a positive prognostic indicator; people diagnosed after age 55 have better 5-year survival rates.
B) Patients with familial ALS have a better prognosis that those with sporadic ALS.
C) Those with limb-onset ALS have a better prognosis than those with bulbar-onset ALS.
D) Disease-modifying medications,if taken early after diagnosis,can increase life expectancy by 10 years or more.