AO-19 addresses unacceptable conditions. It says, in part, an assignment condition is unacceptable when it limits the scope of work to such degree that the assignment results are not ______, given the intended use of the assignment.

• A. Timely
• B. Credible
• C. Defensible
• D. Verifiable

Answer: (B)

The main idea here is that the scope of an appraisal assignment must yield results that are credible for the intended use. If the work is limited so much that the conclusions cannot be believed or relied upon for the user’s purpose, the assignment condition is unacceptable. Credible means believable and trustworthy, grounded in appropriate data and sound analysis, and suitable for the decision the user is trying to make. Even if the timing is good or the reasoning could be defended or the data checked, credibility is what matters for the user to rely on the conclusions. So the missing word is credible.