Company officers should ensure unit members select the highest level of PPE based on:

The correct answer highlights the importance of assessing the potential danger created by the hazard when determining the appropriate level of Personal Protective Equipment (PPE) for unit members. Selecting the right PPE is crucial in minimizing risk and enhancing safety in hazardous environments, such as firefighting or hazardous material response situations.

Understanding the specific dangers associated with a situation allows officers to make informed decisions about which PPE will provide the necessary protection for their team. For example, if there is a risk of chemical exposure, level A PPE may be required, whereas a structure fire might necessitate different gear. The effectiveness of PPE is largely dependent on its ability to mitigate the specific hazards present during an operation; thus, evaluating the danger is fundamental to ensuring the health and safety of firefighters and other responders.

The other options do not adequately consider the necessity to assess hazards directly related to the situation. Factors like an individual's height and weight, dispatch information, or equipment defects may influence overall safety logistics, but they do not supersede the need to tailor PPE selection explicitly to the dangers encountered in a given context. Therefore, the emphasis should always be placed on the hazards to determine the appropriate level of protection required.