Final answer:
The Ku Klux Klan targeted immigrants, Catholics, and Jews, but not Protestants.
Step-by-step explanation:
The Ku Klux Klan targeted various groups, including immigrants, Protestants, Catholics, and Jews. However, out of the options given, Protestants were not specifically targeted by the Ku Klux Klan. The KKK was primarily opposed to groups that they considered to be threats to white supremacy, such as African Americans and those promoting racial equality.
Learn more about The groups targeted by the Ku Klux Klan