Which of the following sentences contains a nonrestrictive clause?

Question

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As a coach, my father is pretty demanding.
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The man who coaches this team is my father.
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The coach of this team is a man of many talents.
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My father, who coaches this team, is a man of many talents.
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Answer 1

The sentence that contains a nonrestrictive clause is:

"My father, who coaches this team, is a man of many talents."

In this sentence, the clause "who coaches this team" provides additional information about "my father" but is not essential to identify him, hence it is nonrestrictive and is set off by commas.