How does the author support the claim that the search for Fawcett was "one of the greatest
manhunts of the 20th century"?
A by discussing the time, money, and effort put into finding Fawcett
B by describing the mystery surrounding Fawcett's disappearance
C by telling how researcher David Grann went looking for Fawcett
D by describing the high-tech gadgetry used to find Fawcett
