What were the consequences of the rise of large estates?
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Upper-class Romans who owned latifundia had enough capital to improve their crops and livestock with new strains, putting peasant smallholders at a competitive disadvantage. Thus latifundia virtually supplanted the small farm as the regular agricultural unit in Italy and in the provinces by the 3rd century ad.

Explanation:

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.