Hi help is really needed

Which of the following led directly to the formation of the Mongol empire?

The unification of Mongol tribes by Termujin

The kidnapping of Termujin’s wife by the Mongol chieftain

The payment of tributes to the Mongol army

The invention of trebuchet by Mongol engineers

the answer is expolration. hope this !

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.

charles lindbergh hope this