Mark the letter A, B, C, or D on your answer sheet to indicate the cor

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.    

They decided to cut down their carbon footprints. They were praised for that.

• A. A. They were praised for having decided to decrease their carbon footprints.
• B. B. They were not punished for having decided to decrease their carbon footprints.
• C. C. Unless they decided to cut down their carbon footprints, they were praised for that.
• D. D. If they decided to cut down their carbon footprints, they would be praised for that.

Tạm dịch: Họ được khen ngợi vì đã quyết định cắt giảm lượng khí thải CO2 của mình