We need further information to find the answer like a page or something
I think the answer is A.Power and dignity
cause: 70,000 known members of the communist party in America
Effect : Attorney general appointed J. Edgar Hoover to help hunt down suspected communist to socialist and anarchist
Answer:
B. geographic features protected the North China Plain.
Explanation:
The North China Plain is protected on four fronts by imposing geographical feature, which allowed early Chinese civilization to flourish without much external influence or threat.
To the north, the Gobi Desert, to the West, the Chinese Mountains, and the Tibet, to the South, more mountains, and to the West, the China Sea and the Pacific Ocean.