Hannah had an early experience with anti-semitism

a. at the local swimming pool
b. at her synagogue
c. in her school
d. in a movie theatre

Answer could be any of the above EXCEPT for B at her synagogue.

Anti-semitism means anti-jewish essentially.  Synagogue is where she would go to worship and thus be the one place where she wouldn't encounter it.

If it's an "early" experience being the distinction then the most likely answerw would be C. in her school

Ithink the answer would be b