Why did Nationalism led all countries to join World War I?

ince it drove countries against each other, as nationalists were all trying to prove their country to be superior. For example, a nationalist action that relates to World War 1 was the assassination of Archduke Ferdinand.

Explanation:

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the answer is: c. c.it limited the president’s power to start wars.

the war powers resolution of 1973 requires the president to notify the congress whenever the president wanted to order a military operation to other countries within 48 hours. if after being reviewed the congress disagree with the proposal, that the president will be banned from ordering the operation.

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