Which direct strategy commonly used by interest groups involves lawsuits, legal fees, and amicus curiae briefs? A. Regulating lobbyists B. Identifying corrupt lawmakers C. Establishing political action committees D. Using the court system

D. Using the court system<br /><br />This strategy involves interest groups engaging in legal actions, such as filing lawsuits, covering legal fees, and submitting amicus curiae briefs to influence court decisions and advocate for their causes.