90° because it is sent out the same angle when yo are getting reflected angle you add them both together.
c) open
I think this because when you're in an open space (such as starbucks) it's public for anyone to enter. I think.
Information that indicates ground air or navy force levels or dispositions is <u>confidential</u> security.
Security for a country's higher organizations is essential for a nation's protection.
Serious information like the nuclear organizations, army, navy, and ground air is at a higher risk for threats and hence requires higher security.
The information in such higher organizations is kept confidential and no third person is allowed access to the code of conduct of such organizations.
If information is leaked from the ground air or from navy force levels then there can be serious consequences for it. Hence, such information is always kept under confidential security.
To learn more about security, click here:
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