To what extent had the USA become a world power by 1914?

Why is it useful for historians to base certain studies on the analysis of historical periods

Leah deposited $50,000 in the bank. three years later, she borrowed $40,000 for a new truck. from this description, which is the most accurate statement?

The idea of manifest destiny simply stated it was america's destiny to expand from the atlantic ocean to the pacific. the word "destiny" implies an idea that it was within our rights as a nation to expand. in a paragraph of 125+ words, explain what could be wrong with that idea.