What was the effect of increased Nationalism among European nations?

A. It created a system of alliances for control of Asia and Africa.

B. It created intense rivalries and competition for colonies.

C. It created opposition to the Monroe Doctrine in Europe.

B. It created intense rivalries and competition for colonies.

Explanation:

Such rivalries and competition for colonies were reflected in the Berlin Conference in 1885, which was also coloquially known as "The Division of Africa", the construction of alliances (Central States, Entente Cordiale) that ignited World War I.