Which Applies to Synergist Muscles

Which applies to synergist muscles?
A: Assist the agonist
B: Assist the antagonist
C: May stabilize the point of origin
D: May contribute to tension at the insertion site
E: Most useful at the end of a movement

A) a,c,d,e
B) b,c,d,e
C) a,c,d
D) b,c,e
E) b,c,d