challenge: What is the official title of the Ambassador of Latvia to the United States?
  
  A. His Excellency Ambassador Extraordinary and Plenipotentiary of Latvia
  B. His Excellency Ambassador to the United States
  C. His Excellency Ambassador Extraordinary and Plenipotentiary of the Republic of Latvia to the United States of America
  D. His Excellency Ambassador of Latvia
  Answer: 