Why Do People Often Fall Prey to the Availability Heuristic

Why do people often fall prey to the availability heuristic and draw incorrect inferences?

A) What looks like the typical case may not be representative of the typical case.
B) People are far better at making inferences about themselves than about others.
C) People wrongly assume that correlation implies causation.
D) What is easily brought to mind may not be typical of the big picture.
E) People often ignore base rates.