Final answer:
The correct option is b) The bylaws.
A unit owner should refer to the condominium association's bylaws to determine whether flag displays are prohibited, as they contain the rules and regulations governing the property.
Step-by-step explanation:
To determine whether the association prohibits property owners from displaying a flag, a unit owner in a planned community condominium should refer to the bylaws of the association.
The bylaws typically detail the rules and regulations that govern the actions of the unit owners, including restrictions on common area usage and personal property displays.
The articles of incorporation establish the association but often do not contain specific regulations, while the condominium map illustrates the layout of units and is unlikely to include such rules. The seller's property disclosure would generally detail the condition of the property but not the association's rules about flag display.