Answer:
required by a legal, moral, or other rule; compulsory.
Explanation:
The answer is D, the mirror reflects what's going on outside of the tower
The answer should be A! Hope this helps :)
Answer:
✓More than a hundred million e-mails are sent around the world each day, and they are all vulnerable to interception.
✓Other attacks include the use of viruses and Trojan horses.
✓Only a small fraction of the information flowing around the world is securely encrypted. :)
