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.
A state of political and milatary tension after world war 2 between powers in the western Bloc
Answer
B. It made the production of goods more efficient and decreased prices.
Why
Because this is the most reasonable advantage we have from advancements in robotics relating to economy
