Answer:
The correct answer is A. Between 1945 and 1975 the U.S. government secretly monitored telegram traffic entering and leaving the United States, as well as other communications. The name of this project was Operation Shamrock.
Explanation:
Project Shamrock was a spy program of the intelligence agency NSA. It started in 1945 and was used to record and evaluate all telegrams that crossed the borders of the USA in both directions.
The basis of the program was the cooperation of private telegraph companies such as Western Union. They collected copies of the telegrams, which were stored first on punch cards and then on magnetic tapes, and made them regularly available to the NSA.
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One similarity between the two is that they both introduced a new way of thinking.
Answer:
The speed of the airplane is approximately 770 km/h (214 m/s).
Explanation:
Speed = 
Distance = 3080 km
Time = 4 hours
speed = 
= 770
speed = 770 km/h
The speed of the airplane is 770 km/h.
OR
Distance = 3080 km
But,
1 000 m = 1 km
3080 km = 3080000 m
distance = 3080000 m
Time = 4 hours
60 seconds = 1 minute
60 minutes = 1 hour
Thus, 4 hours = 60 x 60 x 4
= 14400 seconds
Therefore,
speed = 
= 213.8889
speed ≅ 214 m/s
The speed of the airplane is approximately 214 m/s.
B , Red cross gives the answer right away
