Because males were returning from war, the females who previously held the males' positions in factories, etcetera, were either forced out of these jobs, or were permitted to keep them, a trend that destroyed the idea of the "stay-at-home mom".
By forming various organizations.
The European Union, for example, unites Europe (Minus Britain these days) under one banner, thus preventing fighting.
A more direct example is the North Atlantic Treaty Organization. NATO protects the "North Atlantic" and Europe from terrorists and invading countries by using the combined military strength of multiple nations.
Answer:
John Wilkes Booth was an actor who opposed Lincoln's policies.
The answer is A. A unitary system
