Which sentence could be added to the passage to best support the idea that World War I was a "calamitous" event?

What were the short-term and long-term impacts of the american revolution

Which of the following statements occurred last in the official overthrow of the russian provisional government in october of 1917? the bolsheviks campaigned for support of their political platform. the bolsheviks organized an assault and stormed the winter palace. the bolsheviks and trotsky’s militia seized key targets in petrograd. vladimir lenin established himself as the leader of the bolsheviks. i know the answers a and d are inccorect.

Enforces the laws.a.legislativeb.executivec.judicial