Which of the Following Statements Is True with Regard to Life

Which of the following statements is true with regard to life expectancy in patients with MS?

A) Prognosis is fairly good; for most patients life expectancy is not reduced.
B) Prognosis is poor; the majority of patients with MS will die within 5 years of symptom onset.
C) Life expectancy is significantly related to whether or not patients are taking disease-modifying agents.
D) Men diagnosed with MS tend to live only 5 to 7 years,while women live an average of 10 years after diagnosis.