One major challenge to military information sharing during disaster response is:

The correct answer highlights the issue of overclassification of information as a significant challenge to military information sharing during disaster response efforts. Overclassification occurs when information that could be useful for response operations is unnecessarily restricted due to security concerns, which can impede collaboration and timely communication among various agencies involved in disaster management.

In disaster scenarios, swift and effective information sharing is crucial for coordinating rescue operations, resource allocation, and situation assessments. When military information is classified at levels that prevent access from non-military agencies, it can create barriers to effective collaboration. This can lead to a lack of situational awareness among responders, delayed reaction times, and ultimately can hinder the overall effectiveness of the disaster response.

While inadequate technology, public mistrust, and limited personnel availability can present challenges to effective disaster response, overclassification specifically hinders the free flow of critical information needed among responders, making it a more central issue in the context of military operations during a disaster.