PART A: Which statement best expresses the central idea of the text?
A Halloween is the best time for behavioral
scientists to study differences between children
and adults.
B Food is a great tool for studying how people
make decisions because each person has a
favorite food.
C Halloween is the only time when behavioral
scientists can observe the choices that people
make.
D Behavioral scientists use Halloween to observe
how small changes affect the choices that people
make.