C or B
Hope this helps!
I'm mostly leaning toward B
Sample of a sentence using 'berlin wall' :
The destruction of Berlin War in November 9th 1989 marked the Reunification of Germany.
The main reason why the Harding administration responded to growing public fears of communists and anarchists is because it did not want to seem "weak" in the eyes of Harding's adversaries, who were looking to replace him in office.
Even today, we can see racism. Its something with human beings to see race of a person instead of just seeing a person.
Hope this helps ya out!