Industrialized European nations competed throughout the world for and . * A. natural resources, technology
B. natural resources, markets for manufactured goods
C. slaves, markets for manufactured goods
D. slaves, technology

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)

Italy , germany, austria, japan, and brazil.