challenge: What types of sources are typically included in Foreign Relations volumes?
  
  A. Documents from international courts, non-governmental organizations, and academic institutions
  B. Documents from presidential libraries, congressional records, and international organizations
  C. Documents from presidential libraries, Departments of State and Defense, National Security Council, Central Intelligence Agency, and private papers of individuals involved in U.S. foreign policy
  D. Documents from Departments of State and Defense, National Security Council, and private papers of U.S. citizens
  Answer: 