According to the passage, where were the OLDEST constructed roads discovered?

The oldest constructed roads were discovered in Mesopotamia, which date back to about 4000 B.C. The passage informs you that Mesopotamia used asphalt roads centuries before Europe and America did, so those two options can be eliminated. The passage also informs you about the discovery of timber roads in England, but the passage\u2019s first sentence identifies Mesopotamia as having the oldest constructed roads.