Explain why tension began to build between the North and the South, give three reasons:

The issue of slavery caused tension between the North and the South. ... Because slaves did not work for pay, free workers feared that managers would employ slaves rather than them. Some workers were even afraid that the expansion of slavery might force workers into slavery to find jobs.

Explanation:

Hope it helps you!

Follow me for more!

I'm Willing to help!

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.