A & B entered into an ante nuptial agreement that they would be governed by the conjugal partnership of gains when they will get married. A year thereafter, they got married. Can they change their property relationship during the marriage?

• A. They can enter into a contract changing their property relationship and from its perfection, they would be bound by another property regime.
• B. They can enter into a contract to change their property regime and it binds them due to the principle of liberty of contracts.
• C. They can enter into a contract changing their property regime but must file a petition in court for its approval.
• D. They can enter into a contract changing the property relationship and be bound thereby because of the principle of mutuality of contracts.