Answer:
c) Alliances required nations to defend each other against aggression.
Explanation:
Secret alliances were formed prior to the outbreak of the war. After the Assassination of Franz Ferdinand the Archduke of Austria-Hungary the alliance systems went into effect leading to many nations protecting one another.
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Answer:
Mercantilism is an economic practice by which governments used their economies to augment state power at the expense of other countries. Governments sought to ensure that exports exceeded imports and to accumulate wealth in the form of bullion (mostly gold and silver).
It cut ties with Britain so other countries would be more inclined to keep them from going back to Britain.
