An identity architect has been asked to recommend a solution that allows administrators to configure...

Login Flows are the least-custom way to present user-specific messaging before a user lands on an Experience Cloud home page. Salesforce designed login flows to insert screens into the authentication journey, which makes them a strong fit for pre-homepage alerts, acknowledgments, and decision points. A custom homepage component can display alerts after login, but it does not satisfy the “before they land on the homepage” requirement as directly. Custom metadata with LWC or a specialized registration handler introduces more build effort than needed. The important platform distinction is timing: login flows run during authentication and can show a screen before the session continues to the destination page. That is why they are commonly chosen for policy notices, onboarding prompts, and personalized pre-entry messages. This is why option B is the best answer in Salesforce terms.