The statement which describes the idea of Manifest Destiny that affected demographic changes in the United States during the 19th century is '' It resulted in large numbers of white Americans relocating from east to west''
Answer: Option A
<u>Explanation:</u>
The Manifest destiny was a doctrine that said the United States of America is destined to spread and expand it's territories from the Atlantic coast to the Pacific oceans.
This also justified why the United States had acquired other nations of the workday. This made the country very strong and attracted a lot of people from the east side to the west side because of better living standard and that is was superior to other regions of the world.