Compared to an interest group representing an industry, or a professional association representing members of a certain profession, which tactic would a public interest group most likely use?

a$)$ Unlike industry groups or professional organizations, public interest groups are less likely to run primary challengers to legislators who oppose the legislation.

b$)$ A public interest group is more likely to bundle funds to supportive members of the legislature.

c$)$ A public interest group is more likely to have its members write a sample piece of legislation that could be used as a template by members of the legislature.

d$)$ A public interest group is more likely to have its members write or call legislators urging them to vote for the legislation.