challenge: What is the taxonomic status of Dermatemys mawii?
  
  A. It is the only living species in the family Dermatemydidae.
  B. It is a genus with multiple living species in the family Dermatemydidae.
  C. It is one of several living species in the family Dermatemydidae.
  D. It is an extinct species in the family Dermatemydidae.
  Answer: 