With respect to reliance by a practitioner on the advice of a third party:

A$.$

It is per se unreasonable.

B$.$

It is unreasonable only if the practitioner knows the third party has a conflict of interest.

C$.$

It is unreasonable if the practitioner knows or has reason to know the third person is incompetent or lacks the necessary qualifications to provide the advice.

D$.$

It is unreasonable only if the practitioner has a question about whether the advice of the third party should be relied on