More So Than People with Other Ideologies, Liberals Have Relied

More so than people with other ideologies, liberals have relied on public interest groups to advance their policy ideas, at least in the past few decades.What makes these organizations distinctive is:

A) that they rely heavily on voluntary contributions of time and effort from their members.
B) that most are funded by major foundations, or a select number of wealthy individuals.
C) that they are far better at getting their messages out to the media than other groups.
D) their unusually strong and lasting ties to the Democratic Party.