() is an area set up by some related alarm sources and alarm output devices, which can be deployed and disarmed in a unified manner, and a unified linkage strategy can be formulated.

 () is an area set up by some related alarm sources and alarm output devices, which can be deployed and disarmed in a unified manner, and a unified linkage strategy can be formulated.
A .  Electronic map
B .  TV wall
C .  Cruise
D .  Defense zone

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Answer: B