Option B, Cimarron Territory, is the correct option.
Explanation:
An area which is now known as the Oklahoma Panhandle was referred to as the Cimarron Territory. It was a 34 miles wide and 169 miles long strip of land. In the decade of 1880, a grassroots campaign attempted territorial standing for Cimarron Territory. A temporary state would combine the territory, promote homesteading, and begin statehood.
It's technically false that the fall of the Berlin Wall symbolized the end of communism since communism still exists, but it did mark the end of communism in Germany.