What serves as the natural border between North Korea and China?

Question

A. The Alps

B. The Yalu River

C. The Daewoo Desert

D. The Pei Wei Forest

Answer 1

Actually, B is correct, but only partly -

The rivers are the Yalu River and the Tumen River.

For answer A, the Alps are in Europe.

For answer C, there is no definitive answer being given by Google.

For answer D, the Pei Wei Forest is an Asian Diner located both in Dallas, Texas, and Lake Forest, California.