According to the article, which of the following is true about Kamen？
A. His invention is marketed exclusively to corporate clients.
B. He has over 150 patents.
C. He believes that his Segway might revolutionize human transportation.
D. He has gray hair.
We can infer from the article that before being officially introduced, Kamens invention
A. was researched heavily for many years
B. was widely reported on by the media
C. was thought to be a hoax
D. was known only as "Ginger"
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