East and West German citizens began protesting so that their countries, which had once been one country, could re-unify. Ultimately, these crowds started dismantling the Berlin Wall that separated East and West Germany. What would make a group suddenly reject the social norms that had allowed for the wall to remain standing for decades? A.
Changes in the law authorized citizens to exercise new rights in public.

B.
When someone took the first piece down, the rest of the crowd had to follow.

C.
East German law no longer applied once the groups made a collective decision.

D.
Protest built a sense of community, emboldening the group to act uncharacteristically.