Answer:
The good choice is:
2) political assassinations
Step-by-step explanation:
After World War One and between 1918 and the mid-1920s, Germany was struck by a wave of political assassinations. Extremist right-wing groups killed more than 300 politicians, government officials and policemen to instill fear and hatred, and used nationalistic and racist propaganda. It was a consequence of the defeat in the war. These events shocked and instilled fear in the American public, together with the violence experimented during the Bolshevik Revolution.