The Cold War ended as a result of internal factors such as Gorbachev's reforms, the weak economy of the USSR and the Satellite States breaking away from the USSR, and external factors such as US-Soviet diplomacy, and various treaties being signed that limited arms.
(Choose whichever you want)
The answer is C because the artist reasoned that she wanted the piece to be apart of its surroundings, as if the memorial were rising from the ground.
The altarpiece is made up of gilt bronze and is on view at The Met.