Answer:
(A.) A resurgence of the Ku Klux Klan.
Explanation:
The 1920s is primarily known for being the Prohibition Era, and in the latter years the start of the Great Depression. One thing to note is that while it is a resurgence of the KKK, the primary targets during this time was not blacks and/or African Americans, but of Catholics and bootleggers & moonshiners. However, whatever groups that not only failed to be Protestant in religion, and were not either "native whites" to the US (i.e. having a lineage from the Colonies) or from the Old World, were also targeted by these attacks. However, while it is noteworthy of the usage of Protestantism as the basis for their actions, Protestant leaders rejected the KKK group.
Learn more about the KKK's history as an organization, here:
https://brainly.com/question/19186682