What is a system of people in different lands who trade goods

What period of history refers to the time when people did not have written records

Which of these best describes why georgia was important to united states during world war i? a)georgia made money by selling cotton and wood to europe. b)more soldiers came from georgia than from any other state. c)many white planters volunteered to serve in the war effort. d)the state had many federal installations and training camps

Which of these persons was a co-founder of twitter? eric schmidt jack dorsey tim cook paul alle