Nowadays, people are searching for more materials to build their houses. A. environmental-friend B. environmental-friendly C. environmentally-friendly D. environment-friendly
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes the following sentence.
Nowadays, people are searching for more ____ materials to build their houses.
A. environmental-friend
B. environmental-friendly
C. environmentally-friendly
D. environment-friendly