Read the pasage carefully then answer the questions below it.
The Battle of Dien Bien Phu ended the Indochina War. Today Dien Bien Phu is a tourist destination. Many visitors are battle veterans or members of their families. As well as visiting the battle site, tourists can enjoy the beautiful scenery of the Muong Thanh Valley, visit the neighboring villages, and share the hospitability of the local people.
Most of the people who live in the area are members of the Thai or H’Mong ethnic minorities. However, they do not depend on tourism alone to live. As Dien Bien Phu is only 30 kilometers from Laos border, it is an important trading center. Food leaves here for Laos and Thailand and goods arrive back to provide for the northern provinces of Vietnam.
What did Dien Bien Phu use to be?
A.It is used to be a battle site
B.It is used to be the neighboring villages
C.It is used to be a war
D.It is used to be the hospitability of the local people.