What Did a Survey by the Congressional Management Foundation Find

What did a survey by the Congressional Management Foundation find about individuals' contact with their House members or senators in the previous five years?

A) About half of those that contacted lawmakers had been prompted to do so by a third party.
B) The vast majority of those that contacted lawmakers had been prompted to do so by a third party, mostly PACs, and through direct contact from major parties.
C) Only about a quarter of Americans had been in contact with their House members or senators.
D) About half of those that contacted lawmakers did so through personal choice, without any prompting.
E) The vast majority of those that contacted lawmakers had been prompted to do so by a third party, mostly lobbying and advocacy groups.