The sentence that correctly uses one or more commas to set off a nonrestrictive clause is Nela, who speaks Spanish perfectly, helped us talk to the store owner.
A nonrestrictive clause is a noun that uses commas to add some information that are no in the sentence before. It give more additional details about the sentence.
Therefore, The sentence that correctly uses one or more commas to set off a nonrestrictive clause is Nela, who speaks Spanish perfectly, helped us talk to the store owner.
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