Final answer:
Interest groups that either support or oppose the proposed amendment will be most active in these types of campaigns.
Step-by-step explanation:
Interest groups that either support or oppose the proposed amendment will be most active in these types of campaigns. They will create advertising campaigns to promote their positions and try to sway public opinion. These interest groups may include organizations such as political action committees (PACs), advocacy groups, or special interest groups.
Learn more about Advertising campaign for or against a proposed constitutional amendment in Texas