Sentence Correction (SC) | Re: The production of goods for export that accounted for about one-third

A) 2006 and the outsourcing of manufacturing by the US helps explain how China has become the largest total contributor to climate change, overtaking
B) 2006, combined with the outsourcing of manufacturing by the US, help explain how China has become the largest total contributor to climate change, and overtook
C) 2006, combined with the outsourcing of manufacturing by the US, helps explain how China has become the largest total contributor to climatechange,overtaking
D) 2006, combined with the
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