1.

which sentence is punctuated correctly?

work-hardened sterling silver wire is stronger than wire that has not been hammered.

work-hardened, sterling, silver wire is stronger than wire that has not been hammered.

work-hardened sterling, silver wire is stronger than wire that has not been hammered

The answer is 'Work-hardened sterling silver wire is stronger than wire that has not been hammered.' Because Work-hardened sterling silver wire is all one thing, and should not be separated by commas.

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