Imagine That Someone Has Developed an Absurd Theory That Asserts

Imagine that someone has developed an absurd theory that asserts that every child with blond hair will be over 6 feet tall when they are adults. An adult friend of yours is blond but happens to only be 5'6". This example best demonstrates which of the following advantages of the case study method?

A) Case studies tend to have variables with stronger operational definitions than do other methods.
B) A single case study can be a rich source for new ideas and hypotheses.
C) Case studies are useful for studying rare events.
D) A single case study can challenge the validity of a theory.