Mark the letter A,...

Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions

A. Because having destroyed the environment for a long time, human beings are now paying a high price for this

B. Having destroyed the environment for a long time, human beings are now paying a high price for this

C. On destroying the environment for a long time, they are now paying a high price for this

C. On destroying the environment for a long time, they are now paying a high price for this