The correct option is D Internationalism
During the Industrial Revolution, when each country eventually began to specialise in certain different aspects, two of the concepts that emerged were nationalism and internationalism. While they had pride in their own national identities as they slowly grew in power, the Europeans also began to interact with each other more - because now, they depended on each other for resources. Thus, nationalism is a sense of loyalty one has towards one's own country, whereas internationalism refers to different countries working together peacefully.