<em><u>He did not receive a majority of the electoral votes. </u></em>
Explanation:
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Answer
The war officially ended with the February 2, 1848, signing in Mexico of the Treaty of Guadalupe Hidalgo. The treaty added an additional 525,000 square miles to United States territory, including the land that makes up all or parts of present-day Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming. Mexico also gave up all claims to Texas and recognized the Rio Grande as America’s southern boundary. In return, the United States paid Mexico $15 million and agreed to settle all claims of U.S. citizens against Mexico.
https://www.history.com/topics/mexican-american-war/treaty-of-guadalupe-hidalgo#section_2
the person introduced modern methods of surgery, such as antiseptics, sterilization, and washing hands was: joseph lister
Prior making those invention, joseph saw a serious problems in post-surgery patients who undergone some sort of infection even after what it seems to be a successful surgery. This problems lead to the creation of antiseptic and sterilization method that still being done by medical professionals today before handling their patients.