The circumstance which limits the freedom of speech as reflected through the provided timeline is that in war times, the act of free speech was limited.
Option C is correct.
WWI was the time period that began in the year 1914 and ended in the year 1918 and was fought after the murder of Ferdinand.
According to the timeline, free speech, that is, the act of individuals being present their viewpoints freely was very lesser in the scenario of warfare in comparison to the times of harmonious situations in the countries.
Therefore, the circumstance mentioned in option C is correct.
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