What type of informational text is James Cross Giblin's The Riddle of the Rosetta Stone?
A)an autobiography that describes the author's lifelong attempts to translate the Rosetta Stone
B)a memoir about the year the author spent researching the Rosetta Stone
C)a history of the discovery of the Rosetta Stone and many people's attempts to translate it
D)a biography of the life of the Rosetta Stone's original author