Both forced people to convert to their respective religions and this was the way in which the influence of Christianity and Islam on post classical society similar. The correct option among all the options that are given in the question is the first option or option "a".
A main goal of the monarchs of Europe during the Age of Absolutism was to "<span>B) centralize political power," since they were "absolute" in their rule--meaning that they did not want any interruption of their power. </span>
The appropriate answer in A. Building the Berlin Wall. The official purpose of the Berlin Wall was to prevent West Germany from undermining the political ideals from East Germany. The Wall also prevent East Germans from going to the West.
Construction of the wall began in 1961 and was used until it's 'fall' on November 9, 1989. The wall was initially concrete and barbed wire but was fortified over time with various check points to monitor traffic.