When a threat to life is common, as are automobile and industrial accidents, only unusual instances tend to be prominently reported by the news media. Instances of rare threats, such as product tampering, however, are seen as news by reporters and are universally reported in featured stories. People in general tend to estimate the risk of various threats by how frequently those threats come to their attention.
The statement 'People tend to magnify the risk of a threat if the threat seems particularly dreadful or if those who would be affected have no control over it' is most strongly supported on the basis of the statements above.