Seasonal adjustment of market data is appropriate when:

Correct Answer

D) Comparing periods that fall in different parts of the year

Why this is correct: Seasonal adjustment is needed when comparing data from different seasons (e.g., a winter sale vs. a spring sale) to isolate market trends from regular seasonal patterns. The best control is year-over-year comparison. Why the other choices are wrong: "Any comparable sold more than six months ago" is not always true; time adjustment may suffice. "The subject property was built in a particular season" is irrelevant to market data. "The appraisal is performed during winter months" doesn't necessitate adjustment if all data is from winter. Exam tip: Adjust for seasonality only when comparing across seasons, not merely for age.