Final answer:
The statement 'People's choices must obey an ordering' reflects the Axiom of Completeness in rational choice theory.
Step-by-step explanation:
The statement 'People's choices must obey an ordering' reflects the Axiom of Completeness in rational choice theory.
The Axiom of Completeness states that for any two alternatives, a person must be able to compare and determine their preference.
For example, let's say Sarah is choosing between two movies, Movie A and Movie B. According to the Axiom of Completeness, Sarah should be able to rank or order her preference for Movie A and Movie B based on her personal preferences or criteria.