When thomas friedman referred to the world as being "flat", he was a. referring to the economy of the u. s, the fact that people in one state could now exchange goods and services with those in another state-including jobs. b. referring to the global economy, the fact that people in one nation can now exchange goods and services with those in another nation-including jobs. c. referring to the landscape of the earth, the fact that erosion is making the surface of the earth flatter. d. referring to the nature of people in the world, the fact that (like a stale soda) people are not as interesting, optimistic and excited as they once were.