What will cause the ARPA to emit a visual alarm，audible alarm，or both?（）<br>A:An acquired target entering into a guard zone<br>B:A tracked target lost for one radar scan<br>C:A tracked target entering your preset CPA-TCPA limits<br>D:A target being initially detected within a guard zone

What will cause the ARPA to emit a visual alarm，audible alarm，or both?（）
A:An acquired target entering into a guard zone
B:A tracked target lost for one radar scan
C:A tracked target entering your preset CPA-TCPA limits
D:A target being initially detected within a guard zone

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