Which statement is supported by the map?

A.
Road systems in Southeast Asia are among the finest in the world.

B.
Long bridges connect the islands of Southeast Asia with the mainland.

C.
Most travel between countries in Southeast Asia happens by sea or air.

D.
Public transportation is cheap and readily available throughout Southeast Asia.

Without the map being provided, it is impossible to accurately determine which one of these statements is supported. Please provide the map for a specific answer.