Answer: D) increasing tensions between European countries.
Explanation:
Rising tensions among European countries resulted in the outbreak of World War I. This situation has been evident since the beginning of the 20th century. The primary reason for the formation of such relations is the uneven distribution of colonies among European countries. Germany and Austria-Hungary wanted more for themselves, while on the other hand, France and Great Britain dominated in that context. This led to the strengthening of nationalism, which would culminate in the First World War.
