A Certkiller technician is on-site to configure a home security alarm system. The
technician needs to create a configuration that alerts the off-site customer
monitoring center whenever the front and side doors are armed and opened.
Which of the following devices does the technician need toinstall on the doors to have
them trip the alarm?

A.
Rug sensors

B.
Motion sensor

C.
Magnetic contacts

D.
Closed circuit TV