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Does anyone have an idea why the following ACT English answer is incorrect?
In the late 1800s, clothing store owner, Levi Strauss patented the practice of putting rivets, tiny metal studs, on the stress points of men's "wasit overalls."
The underlined portion of the question is "owner, Levi Strauss"
My thought is that "clothing store owner" could be considered a non-essential clause and thus surrounding it with commas could be ok.
P.S. In the correct answer the comma after the word "owner" is removed