I believe the correct answer is A
The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. When Russia began to mobilize due to its alliance with Serbia, Germany declared war on Russia.
Increase in trades provides more opportunities for local towns in finding trading partners that could give them profit as the fruit of their hardwork.
This will make them does not necessarily need to depend on the nobles to bring bread to the table, but also bring more wealth and investments into their town and improve their economy as a whole.
ANSWER: C) The economy was getting weaker because employment was low.
EXPLANATION: The economy gets weaker as the employment graph goes down. Unemployment has a ripple effect in the society as well as on the economy of the country. For example, if one person becomes unemployed because of any reason and there is no one to fill the gap, then the state is losing a person's taxes and subsequent revenues. Also, we can assume that there will be less productivity because of his absence. So, when many people goes unemployed, the country loses a significant portion of taxes of those residents. This causes a downfall in the GDP of the country.
