How did the 'clear and present danger' test evolve into the modern standard of protecting political speech?

• A. Schenck v. United States introduced the 'clear and present danger' standard, later superseded by the 'imminent lawless action' standard in Brandenburg v. Ohio.
• B. It became more protective in the early 19th century and remains the same today.
• C. It was replaced by 'prior restraint' doctrine in the 1930s.
• D. It had no impact on free speech jurisprudence.

Answer: (D)