单项选择题
A.The sensor itself
B.The way the zones are wired
C.The zone type
D.The digital dialer
单项选择题 WhichofthefollowingisaRFpeertopeermeshprotocolusedforlightingandotherresidentialelectronics？（）
单项选择题 WhichofthefollowingisMOSTlikelycausinganintermittentflashingLEDonanIRreceiverwhentheremotecontrolisnotbeingused？（）
单项选择题 Acustomernotifiestheintegratorthatthesystemkeypadreportstroubleatawindow.Uponinspection，thecustomerfindsthewindowclosedandlocked；thecustomerresetsthesystemanditfailstocorrecttheissue.Whichofthefollowingstepsshouldtheintegratortaketoresolvetheissue？（）