6. Which mountain pass in central Vietnam was a strategic location during the Vietnam War and is now a popular tourist destination?

A. Hai Van Pass

B. Deo Ca Pass

C. Pha Din Pass

D. Ho Chi Minh Trail

7. Which province in the Mekong Delta region is known as the "rice bowl" of Vietnam?

A. An Giang

B. Can Tho

C. Tien Giang

D. Ben Tre