How many justices are on the Supreme Court?

The Supreme Court of the United States is comprised of nine justices. This structure has been established since 1869 and is outlined in the Judiciary Act. The justices are appointed for life, though they can be impeached or choose to retire. The inclusion of nine justices allows for a majority decision to be made on cases, enhancing the court's capacity to resolve disputes and interpret the law. This configuration ensures that various perspectives are represented while also facilitating decisive rulings on crucial legal issues. The other options, such as eleven, seven, or five, do not reflect the current composition of the court and do not align with the historical precedent set for the number of justices serving on the Supreme Court.