An administrator is troubleshooting a communication problem between two application sewers, on different nodes (node-A and node-B), within a cell that has administrative security enabled. Based on prior investigation, they believe that the problem involves a missing signing certificate on node-B.
What should be done to verify this theory?

A.
Manually propagate the key.p12 file for node-B to the plugin directory and restart the application servers.

B.
Verify that the CellDefaultTrustStore has the appropriate signing certificates in it and run the syncNode script on node-B.

C.
Get a new certificate for the application server from a Certificate Authority and import it into the application servers ServerDefaultTrustStore.

D.
Update the NodeDefaultkeyStore for node-B with a new signing certificate, do a Full Resynchronize of the cell, and restart the node agents and application servers.