Which operation is required when debugging on a handset through the network using the Android
Debug Bridge(adb)?

A.
Set the port number to be used as5554.
B.
Specify the handset’s IP address as an adb startup option.
C.
Set the environmental variable ADBHOST as the handset’s IP address.
D.
Check “Allow ADB debug connection” on the handset settings.
Explanation:
I have the same idea. C