Some of the peoples it conquered didn't want to be ruled by the Incas and were rebellious, mainly, and it was so big that it couldn't keep the conquered in line very well.
I think it eliminated the House Of Lords
I would say B.
as Imperialism during the industrialization era allowed for nations to colonize under developed nations in Africa and Asia. Which gave them access to their natural resources and markets
For example the British Empire had a vast amount of land with a array of resources but they held economical markets in Asia (China, India and Malaysia)