Sodium is preserved in
a. water
b. kerosene

sodium is preserved in Kerosene so that it couldn't expose to the air.

hope it helps!

Explanation:

Sodium is preserved in kerosene because it could not exposed to air.

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.

disease was the number one killer of native peoples. they had had little exposure to the diseases of europe. this led to some villages being almost completely wiped out and some tribes destroyed.