When an RS232 device is connected to a Cisco IR829 router, the data collected is not being parsed correctly by the edge

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When an RS232 device is connected to a Cisco IR829 router, the data collected is not being parsed correctly by the edge application.
Which two steps should be taken to troubleshoot the issue? (Choose two.)

A. SSH access on the Cisco IR829 router must be enabled for IOx Guest OS.
B. Communication mode must be set to half duplex over serial connection.
C. Serial cable length should not exceed 1.5 meters.
D. Ensure that communication parameters like baud rate and parity are set correctly.
E. Set the cable connections based on the PIN layout from the sensor vendor.