What stopped the civil war between Nationalists and Communists in 1937?

As I guess that this is a question about China, the answer is the invasion of Japan on China.

Explanation:

While China had its internal problems  Japan decided to use the situation and to  launched an to invade China in 1937. They already controlled Manchuria, so they started bombing China. Many people died from bombing, and later from starvation. In just a year Japan managed to control a large portion of China.

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.

the answer is a. harriet tubman was a nurse on the battlefield.