Which of the following was NOT a factor that made Estonia particularly vulnerable to a cyberattack in 2007?
a. Most of the nation's banking transactions and parliamentary elections are affected through the Internet.
b. Main media outlets could be shut down, effectively isolating residents and preventing them from appealing to a global audience.
c. The nation's nuclear facilities were run on a Windows operating system that was uniquely vulnerable to Stuxnet.
d. The country has an extensive network of free Wi-Fi.
Answer: c
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