Read the following text and choose the bes...

Câu hỏi: Read the following text and choose the best answer.

A. Tourists can explore Son Doong Cave daily throughout the year.

B. The cave was formed about 2 to 5 million years ago.

C. It was formed by river water eroding away the limestone underneath the mountain.

D. Some of the stalagmites in Son Doong Cave are about 70 metres tall.