There were many such programs and doctrines. Programs such as the slave trade where people were considered to be animals or property helped bring racial inequality, while doctrines were like those created by Europeans that claimed that other races are biologically less worth than white people, which is why they should be treated differently.
Unrestricted submarine warfare, which became prominent in World War I, meant that submarines could sink any time of vessel at any time without warning. Before this, they had to surface first and place crews on lifeboats.
Answer: The correct answer is A-they rejected any treaty that included the League of Nations
Explanation:
