Many events happened before loyalists left Boston and Philadelphia. Some major events were the Boston Massacre, Boston Tea Party, and some of the beginning battles of the Revolutionary War, like battle of Bunker Hill and Dorchester Heights. After Dorchester Heights, in Boston, many loyalists left when the British were kicked out. <span />
<span>C) When a strike threatens the public welfare, the federal government is expected to step in.
This was represented in the Coal Strike of 1902 where the government stepped in.
Hope this helps :)</span>
I believe it’s B. delegated powers
Previous American policy had centred around Isolationism. They did not want to get involved in foreign affairs and believed they didn’t need to. With the Truman doctrine, they wanted to contain the spread of communism, so they were prepared to fight wars and become involved on global politics to prevent such from happening.