Correct Answer: Repeal

Solution : The correct choice is the fourth option .

The word revoke means to officially cancel or withdraw something, such as a law, decision, or privilege. The synonym repeal also refers to the act of revoking or cancelling something, especially a law or regulation

The meanings of other options are as follows:

• Sustain means to support or maintain something, keeping it in existence or operation.
• Regret refers to a feeling of sadness or disappointment about something that happened or was done.
• Repeat means to do or say something again, replicating an action or event.