Final answer:
Interest groups can use amicus curiae briefs and file cases in the Supreme Court to influence court decisions and change public policy. The correct answer is option A.
Step-by-step explanation:
Interest groups can use amicus curiae briefs to influence court decisions. Amicus briefs are used when the interest group is neither the plaintiff nor the defendant in the case, but will be affected by the outcome. Lawyers for the interest group write their brief to educate the judge about the decision's impact on them.
Interest groups can also lobby the judicial branch by filing amicus briefs. These briefs present legal arguments stating why a court should take a case or rule a certain way. Interest groups can file amicus briefs both before and after a case has been granted cert.
Many interest groups have taken cases to the Supreme Court in order to change or implement public policy. For example, the NAACP filed the famous case of Brown vs. The Board of Education of Topeka, which led to the desegregation of schools in the United States.