When natural disasters are involved, quick timing is key. A siren and a radio announcement would be the fastest way of informing the public of an approaching tornado. Of the rest of the options, a television crawl message would be faster than a newspaper article. So the media that I would not use to inform the public would be C) A newspaper article.
Always say no never consume anything that you are not sure of what the substance is and in this situation just don't go you can never be to safe at least that's what I would do anyway