Answer:
Non violent protest ( c )
Step-by-step explanation:
Non violent protests was one of the very effective way Native American tribes used to make their demands known to the Government. and to keep a radioactive waste dump from been built .
The native Americans who were known as the five river tribes( The fort Mojave, Chemehuevi, Quechan, cocopah, and the Colorado Indian river tribes ) alongside environmental activists occupied the ward valley in California which was the proposed site to build a radioactive dumpsite. the occupied it for 113 days in 1998, to protest a bill that was passed to build a radioactive dumpsite there.and eventually the proposal was dropped also because of a judgement made against it in compliance with the protests made by the Native Americans.