What is the greatest weakness/concern of using primary sources?

Personal opinions, views, and beliefs can shadow the truth of what actually happened.

Hope this helps :)

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.

not to sure thinking it would be a hope this