challenge: What degrees did Joan C. Williams obtain?
  
  A. B.A. in History, master's in City Planning, J.D. in Law
  B. B.A. in Mathematics, master's in Political Science, J.D. in Law
  C. B.A. in English, master's in Economics, J.D. in Law
  D. B.A. in Psychology, master's in Computer Science, J.D. in Law
  Answer: 