Democracy it was used in Ancient Greece
The correct answer is alternative C.
The United States Constitution expressly forbids the government to pass <em>ex post facto</em> laws, which are laws that can change the legal consequences of actions in the past. In some countries <em>ex post facto</em> laws are acceptable in some situations, but in the U.S. this is such an unacceptable thing that it seemed obvious and unnecessary to include in the Constitution.
Socialism is a range of economic and social systems.
The reasons as to why Irish citizens immigrated was to escape religious and political persecution. The Irish Potato Famine was another reason for this because potatoes were the staple food at the time which forced peasants to leave Ireland.
