If you were a specialist working for the national security agency, your main job would likely be a. analyzing data from spy satellites. b. working in the field to carry out covert operations. c. analyzing and breaking coded messages. d. electronic surveillance.

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.

during both period congress passed law restricting the civil liberties of american citizen that meet with the overall public support is the one statement that explain the rate scare of the 1920 and 1950 is very similar