1. Choose 3 early River Valley Civilizations and compare and contrast the following: economy, political structure, religion, technology, and "how we wknow what we know"

mass production/ assembly line production

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.

you didn't list the options. however, a few communist countries today are: the people's republic of china, north korea, and cuba.