Why did plantation owners prefer white servants and african slaves to american indian workers?

Explanation:  Plantation owners preferred white servants and African slaves to American Indian workers because both white servants and African slaves were superior in numbers to these, since many of them perished, victims of diseases such as smallpox, fever Yellow and cholera among others. Besides the white servants, they were considered as such and not slaves, since they worked for a salary; African slaves were his property and because of their racial status they were considered inferior to American Indian workers whom many masters considered undesirable servants and who were subsequently forced to live in reserves established by the United States government because of their ethnicity.

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.