Suppose It Is That Time of the Year for the National

Suppose it is that time of the year for the National Public radio station to invite every listener to pledge and support the station.Donna is a daily listener and decides to wait for others to contribute and support the station.Meanwhile,she continues to get the benefit of public broadcasting.This is an example of the

A) public good problem.
B) free-rider problem.
C) rival in consumption problem.
D) drop-in-the-bucket problem.