Answer:
The group that reemerged in the early 1900s as a result of Leo Frank's trial was:
B. Ku Klux Klan
Step-by-step explanation:
Leo Frank was a Jewish man convicted for the murder of a 13-year-old girl. After having had his sentence commuted from death by hanging to life in prison, Frank was taken from his cell and lynched. The case had broad repercussion, and groups revived that were related to racism, both for and against it. One of the groups that experienced a regrowth after Frank's case was the Ku Klux Klan which, as we know, gather people who, for some reason, believe in the superiority of the white race. Some of the people who were part of the mob that lynched Frank were charter members of the Klan.