Where is John Ranger permitted to carry his concealed firearm?

John Ranger is permitted to carry his concealed firearm on the premises of county livestock auctions due to specific regulations that allow individuals with the proper licenses to carry firearms in certain public places where it is deemed appropriate. In many jurisdictions, livestock auctions are seen as venues that can accommodate the presence of licensed firearm carriers, especially in rural areas where such practices are more common and culturally accepted.

The other options present various restrictions: schools typically prohibit firearms to protect students and staff; bars and clubs often have regulations against carrying firearms to prevent potential conflicts that can arise from alcohol consumption; and public transportation systems usually have their own set of rules that limit firearms to ensure the safety and comfort of all passengers. Therefore, the specific allowance for carrying a firearm at county livestock auctions is what makes this choice valid.