Answer:
d. Those involved in the lie must reveal the truth as soon as it becomes safe to do so.
Step-by-step explanation:
Barker and Carter (1991, 1994) proposed a typology of lies and also differentiating tolerated lies, accepted lies, and deviant or abnormal lies. Accepted lies are the type of lies which is used during sting operations, undercover investigations and so on.
Part of their typology on accepted lies is that, those involved in the lie must reveal the truth as soon as it becomes safe to do so and must willingly admit lying if prompted or pressed by a legal authority or superior officer.