WHAT IS THE MESSAGE TO READER

50. - DE THI VAO THPT 50 CAU TRAC NGHIEM
DE THI VAO THPT 50 CAU TRAC NGHIEM
50. What is the message to reader? A. We should take action to protect our water resources. B. We should take all water resources into account.C. We should limit the use of water resources. D. We should encourage people to use safe water.