Which of the Following Was NOT a Source of Discontent

Which of the following was NOT a source of discontent in the colonies at the start of the nineteenth century?

A) Enlightenment ideas about progress and the rights of citizens.
B) Strict and hierarchical racial categorization and prejudice.
C) The decline of agricultural production and of once-thriving industries such as mining.
D) The increasing tax burden on even the poorest subjects of the empires.