How should you transport firearms safely in a vehicle?

Transporting firearms safely in a vehicle should always involve keeping them unloaded and locked in a gun case. This helps to prevent accidental discharge and keeps the firearms secure from theft. Option A is not a safe method as loaded and unlocked firearms can result in serious accidents. Option C is also not recommended as it increases the risk of accidental firing and makes it easier for someone to steal the firearm. Option D is not a safe method either, as openly displaying firearms can raise suspicion and potentially lead to legal issues. It is important to prioritize safety and follow proper guidelines when transporting firearms.