In Texas, the rights of African Americans .

Texas laws blocked the migration of free African Americans into the state. White Texans also restricted the civil liberties of White opponents of slavery in order to suppress dissent about the institution. When rumors of a slave insurrection circulated in the state in 1860, Texans virtually suspended civil liberties and due process.

4 copper and gold, the california gold rush is why im pretty sure.

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.