Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences given.Câu hỏi They decided to cut down their carbon footprints. They were praised for that. A. They were praised for having decided to decrease their carbon footprints. B. They were not punished for having decided to decrease their carbon footprints. C. Unless they decided to cut down their carbon footprints, they were praised for that. D. If they decided to cut down their carbon footprints, they would be praised for that.