challenge: What was the inspiration for the Tin Goyenda series written by Rakib Hasan?
  
  A. The Nancy Drew series by Carolyn Keene
  B. The adventures of Hercule Poirot by Agatha Christie
  C. The Three Investigators by Robert Arthur, Jr. and other teen-detective titles
  D. The Sherlock Holmes stories by Sir Arthur Conan Doyle
  Answer: 