How many justices are on the Supreme Court?

The correct answer is that there are nine justices on the Supreme Court. This number has been established since 1869 and has remained unchanged. The Supreme Court consists of one Chief Justice and eight Associate Justices, all of whom are nominated by the President and confirmed by the Senate. The role of the Supreme Court is to interpret the Constitution and ensure that laws align with constitutional principles, making the justices' positions crucial for maintaining the rule of law in the United States.

In understanding the options provided, seven, eleven, and thirteen do not reflect the number of justices currently serving on the U.S. Supreme Court, as these figures do not align with the historical or contemporary makeup of the Court. The consistent number of nine serves to provide stability and a clear balance in the decision-making process, which is essential for the functioning of the judiciary as outlined in the Constitution.