An investigation has found that

[manhhiep2509]

Hello.

The sentence is the question 61 in verbal review 2. I modified it so that I do not violate the forum rule.

"An investigation has found that all 20 factories break the new labor laws, that workers work more than 20 hours a day, and that the minimum wage is lower than that mentioned in the new laws."

At first, I did not think the choice is correct because even though the sentence is grammatically correct, what are parallel seems not logical. Specifically, the second and the third findings in the list are the example of the first finding. I expect that the two examples would be in different structure from that of the first finding.

Please tell me whether my expectation is correct?
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Is the bold phrase redundant?

"An investigation has found that, of 20 factories, all 20 factories break the new labor laws

Thank you.

[tim]

You are correct that structurally the correct answer is parallel, so what you want to do is see if any other answer choice exhibits even better parallelism. Just because two of the items seem to be examples of the first doesn't automatically make this one wrong, especially considering the other choices have much worse problems.

As for your question at the bottom of the page, repeating the word "factories" is unnecessary but would not necessarily make it wrong.