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

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.

muhammad (pbuh) was the messenger of allah (swt) his mission was to praise the name of his lord and the words of his lord thats where the qur'an comes in

the exodus of these people from constantinople contributed to the revival of greek and roman studies, which led to the development of the renaissance in humanism and science. byzantine emigrants also brought to western europe the better preserved and accumulated knowledge of their own greek civilization