What do the principles of conformity and progression/regression mean in appraisal?

• A. Properties tend to reflect the value of their neighborhood; higher-valued surroundings raise value (conformity) while dissimilar surroundings can reduce value (regression) or advancement can raise value (progression).
• B. Neighborhood value is independent of surroundings.
• C. Conformity means uniform pricing; progression means market growth only.
• D. They only relate to commercial properties.

Answer: (A)