In Ohio, which of these statements about carrying a concealed firearm in a vehicle is true?

Option A is incorrect because in Ohio, a concealed firearm may be transported in a vehicle but it does not have to be carried on the person at all times. Option B is incorrect because Ohio law requires a concealed firearm to be securely stored while being transported in a vehicle. Option C is incorrect because a concealed firearm must not only be in plain sight, but also in a holster, case, or bag that is in plain sight or securely locked. Option D is correct because in Ohio, a concealed firearm must be in a holster, case, or bag that is either in plain sight or securely locked while being transported in a vehicle. This ensures safety and reduces the risk of injury or accidental discharge.