What event category is associated with resource exhaustion that blocks authorized connections to network resources?

The selection of C as the event category associated with resource exhaustion that blocks authorized connections is accurate because it specifically addresses the scenario where legitimate users are unable to access necessary resources due to the depletion of system resources. Resource exhaustion occurs when network resources, such as bandwidth, memory, or processing power, are over-utilized, often due to malicious activities like Denial of Service (DoS) attacks or misconfigurations.

Category 7 focuses on the effects of depleting system capacity specifically to the detriment of legitimate users. When resources are exhausted, it impedes authorized connections, making this category particularly relevant for identifying and mitigating these types of threats.

The other categories do not specifically target the phenomenon of resource exhaustion. Categories focusing on network intrusion or system alerts encompass broader security events that do not precisely delineate scenarios where resource limitations directly result in denial of access for authorized users. Therefore, C is the most appropriate choice when discussing resource exhaustion and its implications for network connectivity.