Read the excerpt from The Riddle of the Rosetta Stone. These were impressive achievements. But Akerblad's success in identifying so many demonic characters now led him to make a serious mistake. He became convinced that the demonic script was entirely alphabetic. From then on Akerblad, and other scholars like him, made no further progress in deciphering the demonic passage of the Stone.

Based on this excerpt, James Cross Giblin believes that Akerblad was overly .

A. confident
B. determined
C. ambitious
D. enthusiastic

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