If I'm not mistaken the correct answer should either be A. or B. I'm leaning more towards A.
Answer:
Emperor Constantine the Great
During the reign of the Roman Emperor Constantine the Great (AD 306–337), Christianity began to transition to the dominant religion of the Roman Empire.
Explanation:
A-
Because it is the 3 main purposes of the government
thats the year the war started
Ronald Reagan was the first American president who was able to stop the Cold War. This became his strongest legacy. He was able to restore peace with the Soviet Union as he and the Soviet Union President Mikhail Gorbachev was able to set a peaceful resolution during the summit.