What does it mean for a supreme court decision to serve as a precedent?

a. other courts use the decision as a guideline when they rule on similar cases.

b. the decision reverses a decision made in previous cases.

c. the decision expands citizens' civil liberties.

d. congress uses the decision to create new laws related to an issue?

The correct answer is a. other courts use the decision as a guideline when they rule on similar cases.

A precedent is another term for an example. In this case, the Supreme Court decisions work as an example for all other courts within the United States. This is the case because the Supreme Court is the most powerful court in all of the United States. This is why local and state courts pay close attention to the rulings within the Supreme Court, as this court establishes the guidelines for the entire country.