The correct option is A Father Gapon
In December of 1904, four workers who belonged to the Assembly of Russian Workers were fired from the Putilov Iron Works in St Petersburg. When the factory refused to rehire the workers, the rest of the Putilov workforce declared a strike and other factories followed suit. Father Gapon led the procession of workers to the Winter Palace. Upon reaching the Palace, the peaceful procession was attacked by the police and the Cossacks. Over 100 workers were killed and about 300 wounded. This massacre was known as Bloody Sunday.