What does the phrase "Keep Calm and Carry On" refer to in WWII?
1) A British Ministry of Information poster created to encourage Britons during the Blitz
2) A British Ministry of Information poster created to discourage Britons during the Blitz
3) An Italian Ministry of Information poster created to encourage Sicilians during the Allied Invasion of Sicily
4) A cultural meme that was very popular in the mid-2010s and coincided with the mustache trend