Groups wishing to create and develop public support for a position on a specific issue often resort to:

The correct answer is D. Public relations campaign.

A public relations campaign is a strategic communication process that organizations use to build a positive image and support for their positions on specific issues among the public and decision-makers. This can involve various tactics, such as media outreach, community engagement, and awareness-raising activities to influence public opinion. The other options (bribing legislators, buying public votes, and intimidating legislators) are unethical and illegal methods, and thus not viable strategies for garnering public support.