As Early as July 28, 1914, Why Were European Diplomats

As early as July 28, 1914, why were European diplomats becoming incapable of slowing a rush toward war?

A) European kings, tsars, and emperors were too committed to war to heed their advice.
B) Inflexible war plans devised by European generals made immediate military action essential.
C) Ordinary people everywhere went to the polls and voted for immediate opening of the war on all fronts.