The yellow pages of the emergency response guidebook lists which of the following?

The yellow pages of the Emergency Response Guidebook (ERG) specifically list hazardous materials by their identification numbers. This section provides critical information for first responders, as it allows them to quickly identify the type of hazardous material involved in an emergency situation based on the ID number found on the placards or labels of the transportation vehicle. Once identified, responders can refer to the appropriate response guides that follow, which offer guidance on proper actions to take and safety measures to implement during the incident.

The importance of this organized identification method lies in the need for an immediate and effective response to hazardous materials incidents, where time may be crucial to ensuring safety and effective mitigation. Therefore, this systematic approach is vital for enhancing the safety of both the responders and the public, making option B the correct answer in this context.