Which detail best helps answer the research question "Why are federal judges and justices appointed to life terms?"
1. "Federal judges can only be removed through impeachment by the House of Representatives and conviction in the Senate."

2. "Judges and justices serve no fixed term โ they serve until their death, retirement, or conviction by the Senate."

3. "By design, this insulates them from the temporary passions of the public, and allows them to apply the law with only justice in mind, and not electoral or political concerns."

4. "In some cases, however โ such as in the example of a dispute between two or more U. S. states โ the Constitution grants the Supreme Court original jurisdiction, an authority that cannot be stripped by Congress."