Which of the following best describes a common effect of the Inca road system and the Silk Road on their respective regions?

Both enabled a single empire to conquer the peoples along the route.
Both unified the peoples along the route under a central government.
Both brought about intercultural exchange among the peoples along the route.
Both made products from other continents available to the peoples along the route.

Which of the following best describes a common effect of the Inca road system and the Silk Road on their respective regions Both enabled a single empire to conq class=