What happens when a new message attribute is specified in a message condition?

A.
The value set by the policy defaults overrides the attribute set at the condition level.

B.
The attribute set at the condition level overrides the value of the same attribute set by the policy
defaults.

C.
The values set at the condition level and in the policy defaults are concatenated and displayed.

D.
If both the condition level attribute and the policy default are set, an error message is logged, and
the attribute will not be set in the message.