WHAT IS THE MAIN TOPIC OF THE PASSAGE

35. - DE THI THU VAO LOP 10 MON TIENG ANH NAM HOC 2016 2017 PHONG GD DT YEN LAC VINH PHUC LAN 2 CO DAP AN
Lớp 10 Tiếng Anh DE THI THU VAO LOP 10 MON TIENG ANH NAM HOC 2016 2017 PHONG GD DT YEN LAC VINH PHUC LAN 2 CO DAP AN

35. What is the main topic of the passage?

A. Wind on the mountain

B. A problem with trash

C. A dangerous mountain

D. Climbing safely