The internment of japanese americans took place because the united states was involved in world war i. feared the yellow power movement. wanted to end bias against them. was involved in world war ii.

was involved in World War II.

Explanation:

After Japan´s bombing of Pearl Harbor during WWII, U.S president, F.D. Roosevelt, ordered the forced relocation into concentration camps of around 120,000 people of Japanese ancestry, the majority of them being actually U.S. citizens.  

These actions, comparable, in degree, to those conducted by Hitler against people of Jewish descent, amongst others, is one of the darkest chapters in the history of the USA.  

the answer is 1.. i think

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.