While doing research for his trip to the middle east, waldo reads that the area is known as the "crossroad of the world". why would the middle east be called that? question 6 options: a. there are more railroads in the middle east than anywhere else in the world. b. because it is located in the center of three continents-asia, africa and europe. c. because it is located next to the united states which makes transportation easy. d. every road in the world passes through the middle east. explain