The answer is:
-Vietnam
-Laos
-Cambodia
The Rio Grande is the fifth longest river in the United States and among the top twenty in the world. It extends from the San Juan Mountains of Colorado to the Gulf of Mexico (1,901 miles) and forms a 1,255 mile segment of the border between the United States and Mexico.
B.Urbanization began in early river valley civilizations and expanded in classical civilizations. Is correct
There were great practical obstacles to mass black migration . Migration was extremely expensive, difficult to organize, and involved long, often fruitless, negotiations with foreign governments.
