When the nations used all-volunteer armies to fight their enemies, this is not an example of total war during World War I.
This refers to a military conflict where contenders are willing to make any sacrifice in lives to obtain a complete victory.
Hence, the example of total war during World War I is not described when the nations used all-volunteer armies to fight their enemies.
Therefore, the Option C is correct.
Read more about total war
brainly.com/question/23581423
#SPJ1