Why Would a Program Such as a Suicide Prevention Hotline

Why would a program such as a suicide prevention hotline be considered secondary prevention?

A) because there is nothing that can be done to eliminate suicidal behaviors,so there is no way to intervene using primary prevention
B) because the goal of such a program would be to reduce the severity of the problem (in this case,suicidal impulses) that already exists
C) because something else has to happen before this sort of program can be effective
D) because the chance of this sort of program being effective at actually bringing about any change is only moderate at best