Which of the answers below best describes the use of the comma before the word "that" (in the underlined part)?
It seems from the above, then, that the idea that words can cause harm is one that is firmly rooted in the (new) left and widely held by progressive students to be true, which reflects our own findings.

Question

Which of the answers below best describes the use of the comma before the word "that" (in the underlined part)? 
 It seems from the  above, then, that  the idea that words can cause harm is one that is firmly rooted in the (new) left and widely held by progressive students to be true, which reflects our own findings.

Accepted Answer

It is part of the bracketing commas that go before and after the adverbial conjunction "then".

Answer

The comma functions to separate the dependent clause from the independent clause in this sentence.

Answer

It is correct because you need a comma before the word "that" since "that" functions as the subject of the independent clause.

Answer

This is actually a grammatical mistake from the authors. There should never be a comma before the word "that" (perhaps they know German and are just transfering the German rules to the English language?).

Crowdly

Which of the answers below best describes the use of the comma before the word "...

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