The correct answer is During a time of war.
The Schenck vs. United States Supreme Court case deals with the issue of freedom of speech during the World War I era. In this case, Schenck was using his freedom of speech to convince people to avoid the military draft that was taking place in the United States. The Supreme Court ruled that this is not protected free speech, as this speech presented a clear and present danger to American society, especially since this was done during World War I.