In What Way Are Urban Legends Like Contagious Diseases

In what way are urban legends like contagious diseases?

A) People become immune to them over time.
B) People who believe in these tales usually do so for life.
C) They can be prevented by knowledge, just like diseases can be prevented with vaccines.
D) They are concentrated among the lower classes and spread primarily in urban areas.
E) They remain popular because new people are recruited at the same time as others become nonbelievers.