Under what circumstances is it allowed to broadcast criminal history information via radio transmission?

Broadcasting criminal history information via radio transmission is permitted when an officer determines immediate safety needs. This situation arises when there is an urgent requirement to inform law enforcement personnel or the public about a potential threat or risk that could affect safety. For instance, if there's an ongoing situation where a suspect poses a danger, sharing pertinent criminal history information can help ensure that officers understand the context and can respond appropriately to protect themselves and the public.

In other circumstances, such as when the information is routine or redacted, there may be restrictions in place to maintain privacy or adhere to legal regulations. Additionally, suggesting that it is never allowed would overlook the critical situations where public safety is at stake. Thus, the allowance for such broadcasts is strictly conditioned on the immediate necessity to safeguard individuals or officers, making option B the correct choice.