Foil used as a detector on a glass window to signal a surreptitious or forcible entry is an example of a(n):

Foil used as a detector on a glass window to signal a surreptitious or forcible entry is an example of a(n):
A . Vibration sensor
B . Microwave sensor
C . Capacitance sensor
D . Acoustic sensor
E . Electromechanical sensor

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Answer: E