When the complete der ring des nibelungen (the ring of the nibelung) is performed, it lasts about how long?

Hello there!

The ring of the Nibelung is an epic opera cycle that when performed completely, last about 15 hours (4 opera nights). 

This is an opera composed by Richard Wagner over a period of more than 25 years, based on German mythology. The history is about the fighting between gods, heroes and mythological creatures for the control of a magic ring which gives dominance over the world. It is composed of 4 operas, named The Rhinegold, The Valkyrie, Siegfried, and Twilight of the Gods. 

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Cand d are correct because the rest are just showing your mistakes and you don’t want people who are reading a summary you wrote to see all the mistakes you made.

The answer is 0.01 meter