Network segmentation reduces the impact of traffic sniffing by limiting the amount of traffic that may be visible on any one network segment. Network segmentation would not mitigate the risk posed by denial of service (DoS) attacks, virus infections or IP address spoofing since each of these would be able to traverse network segments.

Explanation
During an incident, emergency actions should minimize or eliminate casualties and damage to the business operation, thus reducing business interruptions. Determining the extent of property damage is not the consideration; emergency actions should minimize, not determine, the extent of the damage.
Protecting/preserving environmental conditions may not be relevant. Ensuring orderly plan activation is important but not as critical as reducing damage to the operation.