An athlete's percent body fat by DEXA is 12% while a field bioimpedance device reports 18%. Which evaluative statement about the discrepancy and practical implications for monitoring should be selected?

• A. Conclude that both methods are invalid and substitute only BMI as the primary fitness indicator because it is unaffected by hydration or device differences.
• B. Recognize methodological differences: DEXA likely provides a lower, more precise estimate; bioimpedance can be influenced by hydration and device calibration. For monitoring change, use the same method consistently and standardize pre-test conditions rather than switching devices mid-program.
• C. Default to the average of the two methods and use that mixed value as the most accurate single number for clinical decisions without further assessment.
• D. Assume the higher bioimpedance value is always correct because consumer devices intentionally overestimate fat to encourage behavior change; therefore refuse to use DEXA data for decisions.

Answer: (B)