For large-scale analysis of suspicious login behavior, the feature often referred to as login forensics or forensic login analysis depends on the deeper telemetry available through Salesforce Shield and related monitoring capabilities. The goal is to identify patterns such as average login volume, off-hours behavior, unusual spikes, and outlier users. Basic Login History shows individual events, but forensic analysis is about aggregating and investigating behavior at scale. That is why the organization needs the analytics-oriented login forensics capability rather than a simple list of logins. The architectural point is that fraud detection usually requires richer monitoring and analysis than the standard admin screens provide, especially in a 15,000-user environment. This is why option B is the best answer in Salesforce terms.