Final answer:
Test specimens must be protected from vibration, shock, and temperature extremes during transportation to maintain their integrity and ensure accurate experimental results.
Step-by-step explanation:
During transportation, test specimens must be protected from potential damage that can occur due to various environmental conditions. The correct answer is b) Vibration, shock, temperature extremes. These three factors can significantly affect the integrity of specimens. Vibration and shock can cause physical damage to delicate samples, while temperature extremes can alter the chemical and physical properties of the specimens, potentially skewing experimental results. It's important that specimens are carefully packaged and that conditions are monitored to ensure their preservation during transportation.