Which of the following was an underlying cause of the Great
Depression of the 1930s?

lack of jobs

Explanation:

people were out of job because people were low on money and couldn't afford good

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.