Keywords are "MOST" and "FIRST"; the requirements come from leadership, AI has been deployed and time is a factor. Legal's concern, which is still relevant, means that sensitive data needs to be protected. Based on this alone, we must look for an answer that is able to identify and protect against the exposure of sensitive data in a proactive or preemptive manner. With this information alone, you can eliminate A, C, and D as these are primarily reactive and do very little to mitigate Legal's concern (i.e., these are not the MOST appropriate). In addition to the above, B most directly addresses the concern. While none of the choices appear to directly impact leadership's "rapid" requirement, B is the only actionable item that would directly and proactively reduce risk. You can't protect what you don't know about, therefore you must FIRST classify the data source(s) for the AI. Then based on the classification, you can ensure only the reviewed/approved data sources are used with the AI (i.e., "restrict training and prompt-accessible data source". There's two ways to answer this one, eliminate the wrong choices or know/determine which one is the most correct.

B