Establishments may use which as basis for not likely to occur?

• A. Scientific or technical support, or variety of supporting programs
• B. Historical data only
• C. Personal opinion of staff
• D. Market data only

Answer: (A)

Estimating that something is not likely to occur should be based on objective, evidence-based analysis. Using scientific or technical support together with a variety of supporting programs provides a rigorous, defendable basis because it combines validated data, models, tests, and established procedures. This broad, evidence-driven approach reduces bias and covers multiple angles, making the assessment more reliable than relying on a single source. Historical data alone can miss new conditions or rare events; personal opinions are subjective and inconsistent; and market data alone may reflect external conditions without accounting for internal capabilities or controls. By grounding the assessment in scientific/technical evidence and multiple supporting programs, you get a robust, defensible estimate of low likelihood.