Why did diocletian divide the roman empire into two parts?

Why was the land in the middle colonies attractive to immigrants

Which of the following statements os an example of how climate and vegetation influence lifestyles? a. many south koreans enjoy watching american films and listening to american music.b. many mongolians are pastoral nomads who raise livestock for a living.c. many chinese peasants are moving to cities in search of better jobs opportunities.d. many north koreans wish to see relatives now living in korea.

Why have some historians rejected the labels bc and ad as laels for periods in world history