Computer security management

Answer below questions in 250 to 300 words each.

A)  What do you think is the single greatest physical threat to information systems? Fire? Hurricanes? Sabotage? Terrorism? Discuss this question and provide support for your answer. 

B)  Some organizations prohibit workers from bringing certain kinds of devices into the workplace, such as cameras, cell phones, and USB drives. Some businesses require employees to use clear or see-through backpacks when carrying personal items. What other devices might not be allowed in certain facilities, and why would they be restricted? The video on Google’s Data Center may give you some ideas to write about for this assignment. It should consist of 2-3 paragraphs.

C)  Describe a type of email threat and how a hacker can use it to get sensitive information.  How can a network administrator prevent this type of attack from happening?