What happens to a theory when new evidence is introduced

Which of the following items would serve as a primary source for a historian studiying the american civil war

Why did trump shut down the government?

Napoleon once said that "a revolution is an idea which has found its bayonets." what was napoleon's take on the french revolution? a. he opposed it because he supported the ideas of king louis xiv. b. he supported it and campaigned for a similar revolution in italy. c. he opposed it because he disagreed with the use of violence against french citizens. d. he supported it and to spread revolutionary ideas in corsica.