Answer:
They did not believe that someone could do something so horrible.
Anthropology is the study of culture
The National Reclamation Act funded irrigation projects in West America. So, as you can imagine - the most likely answer here is B! =)
It greatly changed the view of the Vietnam War back in America. People already didn't want U.S boots down on Vietnam, but the My Lai massacre made the U.S People really change views and turn on the war. This also affected the government, which then affected how the U.S commanders dictated the war.
