Read the following passage and choose the best answer marked A, B, C or D for each sentence

The ancient town of Hoi An lies on the Thu Bon River, more than 30 kilometers to the south of Da Nang. Hoi An is famous for old temples, pagodas, tiled-roof houses and narrow streets. Tourists can visit the relics of Sa Huynh and Cham Civilization. They can also enjoy the beautiful scenery of the Thu Bon River, Cua Dai Beach, etc. In recent years, Hoi An has become a very popular tourist destination in Viet Nam. Importantly, the committee of the World Heritages of UNESCO officially certified Hoi An as a World Heritage Site in 1999.

Hoi An is 30 kilometers to the south of__________.