A major reason the United States entered World War I was to 1.
maintain freedom of the seas
2.
stop impressment of United States sailors
3.
protect United States cities from foreign attacks
4.
counter a German invasion of Latin America

no , per capita income is not a true measure of the development because: -it only tells us about average income not how income is distributed among the people.it only give us an idea of the economic aspect.it is only at the qualitative basis.moreover, income is not only the way of development other factors are also as much as important as income.

answer; collective security;

she recieved a treatment not thought to be specifically effective in treating her disorder.