Corn was first brought to Europe by Christopher Columbus. Within 100 years it had spread through most of the Eastern Hemisphere. Which conclusion is supported by this information?

chinese civil war took place over a long period of time between 1927 and 1950. the war was interrupted when japan invaded china in 1936 and by world war ii. the war was fought between the nationalist government of china, also called the kuomintang (kmt), and the communist party of china (cpc).