Answer:
4. Lusitania
Explanation:
The Sinking of the Passenger Liner Lusitania, which carried 128 American passengers, angered President Wilson, for Germany broke their promise of not sinking any ships with Americans in it. However, the Germans, in saying that the ship was carrying military equipment (which makes it a plausible target), was technically a war ship, and can be sinked, without breaking any maritime laws.
~
Explanation:
Why is the free enterprise system subject to business cycles? Because individuals and businesses acting in their own self-interest make economic decisions about factors such as prices, production, and consumption. ... It fixes prices for products.
A primary source is a document or account created from the time under study.
A secondary sources is a document or account created or written after the time
under study. Usually by people who study in whatever subject that is under study.