Why and how does constitutional democracy in the United States depend on the active participation of its citizens?

Answering using one of the three rules, majority rule and individual rights, liberty and equality, and or state and national authority in a federal system.

Martha entered into a contract with terry, an art dealer. according to the contract, terry was to supply 18 th century artifacts to martha for the play she was directing, and martha was ready to pay $50,000 for this. another director needed the same artifacts and was ready to pay $60,000. terry decided not to sell the artifacts to martha. in this case, the court may order terry to: