Vertical integration was a business strategy used by Andrew Carnegie, what was this practice

To dominate the steel market with his company carnegie steel

- "bill clinton ( the 42nd u.s. president, served in office from by low unemployment, declining crime rates and a budget surplus. during clinton's second term, the u.s. economy was healthy, unemployment was low and the nation experienced a major technology boom and the rise of the internet."

islam spread slowly through much of africa through trade and preaching.