The beginning of the klan’s resurgence in 1915 coincided with which of these? a) the outbreak of the world war i. b) the kidnapping of a catholic priest. c) the lynching of a jewish businessman. d) the beginning of the influenza pandemic.

The correct answer is C)The lynching of a Jewish businessman.
 The lynching of a Jewish businessman in Marietta by a group of armed men who had organized themselves as the Knights of Mary Phagan, resulted in anti-Semitic sentiments which together with the ongoing racism fueled the Klan's resurgence.