Which of the following statements is true of tribes that have opened casinos on reservations?

Which of the following statements is true of tribes that have opened casinos on reservations?
 
  a. The tribes do not pay taxes to local, state, or federal governments.
  b. Nationwide, the economic and social impact of the revenue from casinos is limited.
  c. Unemployment in the reservations has substantially increased despite the casinos.
  d. On the reservations that benefit from gambling enterprises, the family income is significantly higher than for the nation as a whole.

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Which of the following have occurred due to the rolling back of affirmative action programs during the 1990s?
 
  a. There have been sharp drops in minority undergraduate students at several University of California campuses
  b. The law school at Berkeley has seen a major increase in minority students
  c. California's medical schools have seen sharp drops in minority enrollments
  d. The enrollment of minorities at Texas's four state medical schools increased by 25 percent