What Did the NAACP's Fight Over the Terrell Law Demonstrate

What did the NAACP's fight over the Terrell law demonstrate?

A) That racism was so entrenched in Texas that public schools could be completely shut down rather than accept black children.
B) That lynching could be legalized in several southern states.
C) That local and community involvement in NAACP activities was very important.
D) That whites would refuse to accept limits on the KKK's activities.