Why Do Washington Lobbyists Often Complain About Having to Attend

Why do Washington lobbyists often complain about having to attend so many fund-raisers?

A) The money organizations and politicians spend on fund-raising often exceeds the amount they can raise.
B) They do not believe their individual contributions will make much difference in political outcomes.
C) Socializing together makes politicians and lobbyists more corrupt.
D) The events are boring and overpriced.
E) Attending so many fund-raisers takes away from time that could be spent on advocacy efforts.