Why did shi huangdi tear down the walls of chinese kingdoms? a. he needed building materials for the great wall. b. he wanted to ensure the nobles could not defend against himc. the walls did not meet his standard specificationsd. he wanted the walls rebuilt with stronger materials i need to finish this test asap. and would anyone be willing to me answer 3 or 4 essay let me know . by the way, anyone that the most i will mark the brainliest: )