Answer :
I believe the answer is: D. electronic surveillance.
Electronic surveillance refers to the act of monitoring the usage of electronic device of the people within a certain territory (such as emails, phones, text messages, etc). National security agency tend to do this in order to detect a certain key phrases being used in the device and prevented an act of terror from happening in the first place.
If I was a specialist working for the National Security Agency, my main job would likely be of electronic surveillance.
Further Explanations:
NSA was officially recognized by President Harry S Truman during the era of the “Second World War” and from then it is the leading and most trusted intelligence organization of the United Nations. In present NSA is collecting international data and is also known to be a physically bugged electronic system. Apart from the electronic presence NSA also upholds a physical presence in many nations worldwide that helps to uphold the nation’s security and continue the nation's influence on the other nation.
National Security Agency is an intelligence organization based on the national level in the United States under the supervision of the “Department of Defence”. The organization is overseen by the “Director of National Intelligence”. The main objective if the organization is the establishment of a security zone for the nation’s network and information System. It relies on numerous dealings to complete its mission. Majority of its measures are clandestine that fulfill all its requirements of the mission.
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Answer Details
Grade: High School
Subject: History
Chapter: National Security Agency
Keywords:
National Security Agency, United States, Department of Defence, Director of National Intelligence, clandestine, President ,Harry S Truman, Second World War, United Nations, electronic system