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

The production of goods for export that accounted for about one-third of China’s air pollution in 2006 and the outsourcing of manufacturing by the US helps explain how China has become the largest total contributor to climate change,overtaking the US.

(A) 2006 and the outsourcing of manufacturing by the UShelps explain how China has become the largest total contributor to climate change, overtaking

(B) 2006, combined with the outsourcing of manufacturing by the US,[color=#ff0000]
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