Why did Shi Huangdi tear down the walls of Chinese kingdoms?

(1 point)
Responses

He needed building materials for the Great Wall.

He needed building materials for the Great Wall.

He wanted to ensure the nobles could not defend against him.

He wanted to ensure the nobles could not defend against him.

The walls did not meet his standard specifications.

The walls did not meet his standard specifications.

He wanted the walls rebuilt with stronger material

He wanted the walls rebuilt with stronger material.