TCF Canada reading drill

Three drills built around the answer sentence of each reading question: paraphrase matching, cloze and word reordering. Reading options are mostly paraphrases of the answer sentence, so this trains finding it and recognizing the rewording.

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C1Environment

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Paraphrase match

Ce système a été parfois qualifié de permis à polluer, car un pays riche pourrait acheter le droit de polluer à un autre ayant réellement réduit ses émissions.

Which option does this sentence support?