C. An essay describing a tour along the California cost
The assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, and his wife Sophie in Sarajevo (the capital of the Austro-Hungarian province of Bosnia-Herzegovina) on 28 June 1914 eventually led to the outbreak of the First World War
It depicts the collective society as a destructive force that represses the independent thinker.
Looking at the excerpt, you can see that even with the warnings they did not heed because of the few who did so. They went with the majority even if they were wrong. These independent thinkers, perished along with them as a result.
B is the most reasonable answer. It doesn't give any clues that he cared if Soda and Darry found out.
