Which idea was unpopular in the Progressive movement? ​

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

other sources of text

explanation:

this can be magazines, news reports, scholarly articles, textbooks, research papers etc.

the us constitution is a living document, meaning that it can be changed over time as the country changes.