Which of the following media would you not use to inform the public of an approaching tornado?
a. a siren
b. a radio announcement
c. a newspaper article
d. a television crawl message

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.