The Initial Trend of Global Inequality Which Came Before the Second

The initial trend of global inequality which came before the Second Global Age was spurred on by which of the actions?

A) the unequal development spurred on by the Industrial Revolution, which benefitted mostly the Western and European countries
B) rapid development of the industrial revolution and the growth of strong states in the Eastern world
C) spread of colonialism, in which these decreasingly wealthy countries retarded the progress of societies that had weak economic and political systems
D) a breakout period for a minority of the world's population, with some 750 million people living in industrializing countries and the remaining 4-plus billion left behind