How do you identify if a result in a decision rule cannot be returned?

How do you identify if a result in a decision rule cannot be returned?
A . Test for missing conditions
B . Test for completeness
C . Test the rule using a unit test
D . Test for conflicts

Answer: C

Explanation:

Reference: https://community.pega.com/sites/default/files/help_v55/rule-/rule-declare-/rule-declare-decisiontable/testing.htm