In Ohio, it is illegal to carry a concealed weapon in which of these areas?

In Ohio, it is illegal to carry a concealed weapon in an establishment where alcohol is served. This is because alcohol can impair judgement and increase the likelihood of violence. Therefore, carrying a weapon in a bar or similar location is considered to be a safety risk. Option B is incorrect because city parks are not designated as establishments and do not fall under this law. Similarly, option C is incorrect because a retail store without a No Guns sign would not be considered an establishment where alcohol is served. Option D is incorrect because not all options are included in the law. Only option A is a correct response.