According to Cecily Hilleary ("Some Native Americans fear blood quantum is formula for paper genocide"), why is changing blood quantum rules hard for some tribes? a. For very large tribes, it is hard to get everyone to agree on a change like this. b. Some tribal members strongly believe that any marriage to outsiders should be avoided at all costs due to personal prejudices. c. For tribes with casinos, the smaller number of individuals in a tribe, the bigger the per-capita payment to each member