Why Is the Concept of Base Rate Important in Decisions

Why is the concept of base rate important in decisions that involve the representativeness heuristic?

A) People usually don't pay enough attention to base rate when making these decisions.
B) People are so aware of information about base rate that they typically make accurate decisions.
C) People rarely make the small-sample fallacy when making these decisions.
D) When people have a background in statistics, they are much more likely to make correct decisions on tasks involving the representativeness heuristic.