The answer is Jean-Jacques Rousseau's writing inspired them to view practices like inherited privilege and absolute monarchy as irrational.
The Zimmermann Telegram (or Zimmermann Note or Zimmerman Cable) was a secret diplomatic communication issued from the German Foreign Office in January 1917 that proposed a military alliance between Germany and Mexico. ... The telegram was intercepted and decoded by British intelligence.
D. the increase of literature due to the printing press
The answer is most likely c.
it shows that it is made for the people and by the people.