The correct answer to this question would be alternative A)"Pogrom".
A Pogrom is a violent riot aimed at the massacre or persecution of an ethnic or religious group, particularly one aimed at Jews.
Kristallnacht was a perfect exemple of an anti-Jewish pogrom, as Nazis in Germany burned synagogues down, vandalized Jewish homes, schools and businesses and killed about 100 Jews. It took place in Germany, on November 9 and 10, 1938.