The answer should be D. Gothic Cathedrals.
Gothic architecture was popular during the late Middle ages. It was a form of evolution (If you will,) of Romanesque architecture.
Hope this helps!:)
Only a few European nations agreed to join the league.
On October 18, 1898, American troops fighting in the Spanish-American War raised the United States flag in Puerto Rico formalizing U.S. control of the former Spanish colony. General Nelson A. Miles had landed approximately 3,500 U.S. troops on the island on July 25. On August 12, Spain and the United States agreed to an armistice; on September 13, the Protocol of Peace was ratified; and on December 10, the Treaty of Paris was signed, ending the Spanish-American War.
B. Mixed system
I'm not entirely sure though!
Can u translate into in english