Answer: B
Explanation: Both World Wars were started due to one country rising up as a Military power and having a Nationalist government. Germany is a good example of this. When Hitler rose to power in 1933, he began to start a Nationalist Government and starting invading some nearby countries.
Answer:
I don't know. That's like asking why people fight in general
Explanation:
I believe rice became a Chinese Staple food during the Tang dynasty because new types of rice and new growing techniques yielded bigger harvests. Hope that helped.