Answer:
You could explain this using the B. Mean world syndrome.
Step-by-step explanation:
The Mean world syndrome is an error in thought in which an individual thinks the world is a much more dangerous place than it actually is because he/she has been long exposed to mass media.
In this case, we can see Martha watches "quite a bit" of television and mostly crime dramas. This long exposure has made her develop this syndrome and thus she believes that her city has a higher crime rate than it does.