By showing that the people's will could overpower that of the monarch
The events of the Tennis Court Oath increase the prestige of the Third Estate "By showing that the people's will could overpower that of the monarch"
On 20 June 1789, the members of the French Third Estate took the Tennis Court Oath in the tennis court which had been built in 1686 for the use of the Versailles palace. The Tennis Court Oath was a pledge that was taken and signed in the early days of the French Revolution. It was an important event as revolutionary act that displayed the belief that political authority came from the nation's people and not from the monarchy and monarchy can be demolished by people's power.
A monarchy is a form of government in which a person, the monarch, is head of state for life or until abdication. The political legitimacy and authority of the monarch may vary from restricted and largely symbolic, to fully autocratic.
Hence, option A is correct.
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