Which of the Following Is True with Regard to Disease-Modifying

Which of the following is true with regard to disease-modifying drugs (such as Betaseron,Avonex,and Copaxone) and their use in patients with MS?

A) They are indicated for patients with both progressive and relapsing remitting forms of MS.
B) They result in a reversal of existing symptoms in 30% to 50% of patients.
C) In some patients,they result in a reduced number of relapses and severity of attacks.
D) They reduce spasticity but have little effect on other signs/symptoms.