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:
The foreign policy of the United States is its interactions with foreign nations and how it sets standards of interaction for its organizations, corporations and system citizens of the United States.
C. the power to veto laws passed by the executive branch
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It states that it is in the interest of all nations for the U.S. and China to work towards normalizing their relations.