Final answer:
Unable to accurately determine which segment failed to qualify for segment reporting without specific financial data or additional context on the abnormal financial conditions.
Step-by-step explanation:
The subject of the question is related to segment reporting in financial accounting, which is part of the business curriculum. In order to determine which of Putney Company's operating segments failed to qualify for segment reporting in 20X8, one needs to understand the quantitative tests prescribed for segment reporting. These tests usually include revenue tests, profit or loss tests, and asset tests. However, without specific financial data for the segments or additional context on the 'abnormal financial conditions' mentioned in the question, it is not possible to accurately identify which segment failed to qualify. In practice, analysts would examine each segment's financial performance against the reporting criteria to identify any changes that caused a segment to fail the qualifying tests.