Why are self-financed candidates less effective than candidates who raise private donations? a. Campaign finance law allows the opponents of self-financed candidates to raise more money per donor. b. Self-financed candidates usually run less efficient campaigns and spend more money on consultant fees and overhead. c. Limits on campaign spending reduce the advantage in time savings for self-financed candidates. d. There are additional benefits to cultivating a network of supportive donors, such as signaling the strength of the candidate to the media and political elites