How should the Admin reference a specific Error Condition record in the text of the Advanced Condition field?

An Admin is creating a Product Rule with an Advanced Condition.

How should the Admin reference a specific Error Condition record in the text of the Advanced Condition field?
A . Value of the Index field
B . API name of the field in the Tested Field
C . Salesforce ID of the Error Condition record
D . Value of the Condition # field

Answer: A