I'm pretty sure the answer is D "Only Roman citizens were allowed to fish and swim in it" although there is a possibilty of it being B because it was controlled by the Roman Empire.
Answer: The answer is -- (A) The Cold War.
Explanation: The Cold War was a period of geopolitical tension between the Soviet Union and the United States and their respective allies, the Eastern Bloc and the Western Bloc, after World War II. The period is generally considered to span the 1947 Truman Doctrine to the 1991 dissolution of the Soviet Union. Hope this helps!
As far as I know I'm pretty sure they weren't free due to the laws around the time period
still need the answer I have it