Why did the railroads initially divide the United States into four standard time
zones?

Originally each locale used its own time: when the sun was directly overhead then it was noon there. ... This setup for telling time began to become impractical as transportation became extensive, reliable, and rapid

Explanation:

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44