Click the Exhibit.

Referring to the exhibit, R-1 and R-2 are connected with a LAG on the ae0 interface. However, the LAG is not operational.
Which action will solve this problem?

A.
Change one device to use LACP passive mode.

B.
Change the system ID on one device.

C.
Set the LACP system priority to a non-zero value on one device.

D.
Set the LACP system priority to a non-zero value on both devices.