The correct answer is B.
Letter choice A is wrong because imperialism refers to the system in which one country controls the social, economic, or political affairs of another country. The goal of this system is for the stronger country to benefit off the country they control.
Letter choice C is wrong because the information revolution refers to the availability of information for people and has nothing to do with the healthcare system.
Letter choice D is wrong because industrialization is defined as the development/creation of a country based around new industries that can produce goods efficiently thanks to advances in technology.