What Led to the Decline of the Klan

What led to the decline of the Klan?

A) People across the country began to see them as common terrorists. Many began to denounce their ideas of racism.
B) One Klan leader was convicted of raping a young white woman, when the Klan was supposedly committed to protecting white women from danger.
C) The Great Depression limited income, and many whites could not afford the expensive membership.
D) The Supreme Court declared them a dangerous, subversive organization.