As witnesses in the courtroom, fire inspectors should confine their testimony to:

• A. Professional opinion.
• B. Facts.
• C. Technical terms.
• D. Department policies.

Answer: (B)

The main idea here is that witnesses should stick to what can be verified as evidence. Fire inspectors, when testifying, should report facts—what you directly observed or measured, and what is documented in records or reports. This means describing things like the scene conditions you witnessed, temperatures or fire patterns you measured, the exact times and sequence you recorded, and any physical evidence you can confirm with documentation or photos. By keeping to facts, your testimony remains objective and checkable, which helps the court understand what happened without injecting personal interpretation.

Why this fits best: Facts are verifiable and non-speculative. They form the concrete basis from which others can draw conclusions about the incident. If you were to offer opinions, those belong only to expert analysis and occur only if you’re qualified and permitted to testify in that role. Technical terms can describe conditions, but they don’t by themselves convey what actually occurred. Department policies describe rules and procedures, not the events of the incident, unless you’re specifically asked to explain how those policies applied to what happened.

So, the safest and most appropriate approach is to confine testimony to factual observations and records, letting conclusions be drawn from those verifiable facts.