Choose the letter A, B, C or D to complete the passage below

Trang An in Ninh Binh is a charming and ___(1)___ site in Viet Nam. The whole picture of Trang An has limestone mountains, forests and golden rice fields. The valleys here are amazingly beautiful like colourful carpets. There are ___(2)___ running along these valleys, reflecting the blue sky above. Making boat trips is a perfect way to fully enjoy the ___(3)___ here. There are also tens of wonderful natural caves that you should ___(4)___ on foot. Many world ___(5)___ call Trang An “Ha Long Bay on the land”.