challenge: Which of the following positions does Donna J. Cox hold?
  
  A. Director of the Illinois Emerging Digital Research and Education in Arts Media Institute
  B. Director of the Advanced Visualization Lab at the University of Illinois at Urbana-Champaign
  C. Professor of Biology at the University of Illinois at Urbana-Champaign
  D. Director of the National Center for Supercomputing Applications
  Answer: 