During the Hippie counter-culture Movement in the 1960s, thousands of Hippies, wearing flowers in their hair, flooded into （） in America?

During the Hippie counter-culture Movement in the 1960s, thousands of Hippies, wearing flowers in their hair, flooded into （） in America?
A.San Francisco
B.Los Angeles
C.Seattle
D.Florida
正确答案：San Francisco